• Wheat yields were low, around 1 t/ha, as a result of low growing season rainfall in 2017.
• Treatments were adjusted to reflect standard grower practice due to drier than normal conditions at the beginning of winter.
• This site was unresponsive to nutrition treatments in 2017.

 

• The Mooneys Gap phalaris site has shown that productive perennial grass and sub clover pastures can double the carrying capacity of a paddock when compared to a rundown annual pasture. The Mooneys Gap phalaris pasture has had an average increase in carrying capacity of 157% compared to the control annual pasture over the three years of the trial.
• The introduction of deep rooted perennial pastures has environmental as well as production benefits. Perennial pastures are more efficient users of water as they are able to access available moisture at deeper levels and for longer periods than annuals and therefore assist in lowering water recharge reducing the risk of salinity. Perennials slow the soil acidification rate by the increasing nitrogen uptake thereby reducing nitrate leaching. Well managed phalaris pastures maintain a level of ground cover well in excess of annual grass based pastures reducing the risk of wind and surface water erosion. The Mooneys Gap phalaris site clearly demonstrates the enhanced environmental outcomes that come with well managed perennial pastures.
• Soil testing is important to test for nutrient deficiencies and pH prior to phalaris establishment. Adequate lime and fertiliser should be applied to address deficiencies prior to establishment. Particular attention must be paid to ensuring that aluminium levels are suitable for phalaris production prior to sowing.
• Weed control is of critical importance before and during the establishment phase of phalaris pastures. Periodic annual weed control measures enhance the production of phalaris based pastures after establishment.
• A suitable fertiliser regime needs to be implemented to replace nutrients removed by the enhanced production of the phalaris based pasture.
• Rotational grazing increases the persistence of the phalaris pasture.
• The addition of phalaris pastures extends the period of available green feed when compared to an annual grass system.
• The recent availability of the Holdfast GT Phalaris variety is an important addition to the perennial grasses that can be established in the region.
• The claims that Holdfast GT will persist as well as Australian phalaris have not been tested due to the time required to obtain results from a new variety.
• PPS will continue to test the persistence of Holdfast GT in the PDS trials as well as other pastures in the project.

This research highlights how important a tactical approach to STNB management is in the medium rainfall zone.  In dry seasons there is lower disease pressure, resulting in a potentially expensive fungicide strategy which can be marginal in returns.  Conversely, where there is high disease pressure usually from wet conditions early in the season, then a double spray strategy can improve grain quality, yield and returns to the grower.

Where growing barley on barley, growers should budget for a fungicide spray at Flag-1 every year to protect the top 3 leaves in the canopy.  Where conditions are wet early post emergent (especially if stubble is retained) allowing early disease pressure and high yield potential then a fungicide spray at Z31-Z32 can reduce disease pressure and protect the canopy until the Flag-1 spray is applied.

Under high disease pressure situations (wet conditions early post emergent) removing stubble prior to sowing barley on barley can reduce inoculum levels and the build up of early disease pressure.  This will also help to reduce the selection pressure for fungicide resistance.

Where there is a dry start to the season and a slow build up of disease then stubble management has minimal impact on the buildup of STNB levels.

Burning barley stubble prior to planting barley on barley has shown to increase yield buy between 325 and 400kg in 2017 and 2015. While removing stubble can reduce early disease pressure, not all the yield increase can be accounted for by disease.  Other factors are involved that may require additional work to understand (N mineralization, allelopathic impacts of stubble or improved seed bed).  Where erosion risk is low growers should consider burning to remove barley stubble if planting consecutive barley crops.

We feel that there is no further work required to investigate the hypothesized link between STNB levels and pre-harvest head loss.

Growers, advisors and the wider barley industry are the key beneficiaries of this research.  Being able to manage disease to maintain grain quality, yield and economic returns to the grower is critical for a competitive barley industry.

This research highlights how important a tactical approach to STNB management is in the medium rainfall zone.  In dry seasons there is lower disease pressure, resulting in a potentially expensive fungicide strategy which can be marginal in returns.  Conversely, where there is high disease pressure usually from wet conditions early in the season, then a double spray strategy can improve grain quality, yield and returns to the grower.

Where growing barley on barley, growers should budget for a fungicide spray at Flag-1 every year to protect the top 3 leaves in the canopy.  Where conditions are wet early post emergent (especially if stubble is retained) allowing early disease pressure and high yield potential then a fungicide spray at Z31-Z32 can reduce disease pressure and protect the canopy until the Flag-1 spray is applied.

Under high disease pressure situations (wet conditions early post emergent) removing stubble prior to sowing barley on barley can reduce inoculum levels and the build up of early disease pressure.  This will also help to reduce the selection pressure for fungicide resistance.

Where there is a dry start to the season and a slow build up of disease then stubble management has minimal impact on the buildup of STNB levels.

Burning barley stubble prior to planting barley on barley has shown to increase yield buy between 325 and 400kg in 2017 and 2015. While removing stubble can reduce early disease pressure, not all the yield increase can be accounted for by disease.  Other factors are involved that may require additional work to understand (N mineralization, allelopathic impacts of stubble or improved seed bed).  Where erosion risk is low growers should consider burning to remove barley stubble if planting consecutive barley crops.

We feel that there is no further work required to investigate the hypothesized link between STNB levels and pre-harvest head loss.

Growers, advisors and the wider barley industry are the key beneficiaries of this research.  Being able to manage disease to maintain grain quality, yield and economic returns to the grower is critical for a competitive barley industry.

• The average yield response to TM21 for the three replications was 26%.
• Yield response from N application also recorded a significant yield increase between 7.5% and 35% but the cost benefit was significantly more for the TM21.
• The highest rate of N without TM21 gave a lower yield response than the TM21 without N. The above graph shows the comparative return from the treatments of urea and TM21. It should be noted that this paddock has a very soft history having only grown oats as a crop prior to this year’s wheat. It has rarely been treated with fungicides or harsh chemicals.
• Worm activity was obvious throughout the trial area with higher worm counts in the treated areas.

The 2007 growing season was extremely dry and proved extremely difficult for trials.

• Widening row spacing reduced established plants per area for a given seeding rate.
• At a yield of 1.5 t/ha there was no yield difference between 19 and 42 plants/m2 or between 18 and 30 cm row spacing in 2008 • At a yield of 0.44 t/ha the low plant population (28/m2) yielded best in 2009
• In the Victorian Better Canola trial farmer-saved hybrid seed reduced crop uniformity (variable plant height), delayed maturity and increased blackleg infection

• On zones where wheat growth is not constrained the French and Schultz method gives a realistic potential yield estimate based on growing season rainfall (GSR) and a soil water evaporation term of 110 mm.
• Where soil water evaporation is higher because of sub-soil constraints and other factors that affect the growth of wheat, the soil water evaporation term must be adjusted.
• Zoning your paddocks into areas of performance and soil testing these areas separately for soil nutrients can improve decisions on where to apply nutrients for the best return.
• Fertiliser application rates at sowing should be strategic, i.e. based on the yield potential of the zone and soil test results (e.g. a sowing application of DAP or MAP on a soil with high yield potential should be supplemented with topdressing applications of N if seasonal conditions are good).

Better grazing systems can be developed for the low rainfall zones of the Wimmera and Mallee. With high livestock prices holding there is a resurgence of interest in how to improve our livestock production systems.

• Incorporation method (deep ripping or spading) reduced plant establishment in both barley (2022) and lentil (2023) as a result of soft and uneven seedbed conditions. However, later in the season NDVI showed the crop had recovered with values similar or higher compared to the control.
• The application of lime in 2022 increased NDVI in all incorporation treatments by an average of 10% on 1st September in the following season lentils.
• In both seasons grain yields were increased by an average of 0.7 t/ha in barley and 1.03 t/ha in lentil from spading and deep ripping. However, this was not influenced by the incorporation of 10.7 t/ha Kulpara lime.
• Soil sampling one year after the trial was established generally showed lime with and without incorporation increased group E/F rhizobia levels compared to the control.
• Long-term monitoring is required to understand the movement and benefit of lime incorporation at depth. 

• We have identified a small group of material with excellent agronomic performance exceeding our benchmark strand medic cultivars, Herald and Angel, by up to and over 30% for dry matter production and seed yield.
• The lines are bred from a cross between Angel strand medic and a line originally selected for powdery mildew resistance. They also have SU herbicide tolerance, aphid resistance and larger seed size.
• If the level of agronomic improvement can be confirmed at regenerating sites, there are good prospects for a future commercial release.
• Unexpected responses to Rhizobium inoculation confirm some grower observations of poor medic nodulation in the Mallee, but the reasons for this remain unclear.
• Root lesion nematode number was substantially reduced following a season of medic growth.

• Rhizoctonia solani AG8 inoculum levels were reduced over summer and this may be associated with summer rainfall events.
• Crop rotation does affect Rhizoctonia inoculum levels, i.e. levels were lowest immediately after canola compared to that after wheat.
• The incidence and severity of Rhizoctonia bare patch disease in cereals depend on the amount of pathogen inoculum, soil microbial community activity and crop/root vigour.
• Seed treatments did not reduce rhizoctonia levels in 2009 trials undertaken on EP and the Mallee.
• To reduce risk of yield loss caused by Rhizoctonia:

Control summer weeds to stop build-up of inoculum,

Encourage early seedling vigour, sow early,

Cultivate deep sow shallow (avoid disc seeders).

• Canola can help reduce inoculum for the following wheat crop.
• Barley and wheat are the most intolerant crops.
• Minimise N deficiency at seeding, particularly for cereal on cereal rotations where summer rainfall has been low, by deep banding N and minimising stubble incorporation at seeding.

• The high input plots all generally yielded below their comparable normal input plot (in the case of the raised beds it was quite significant) and this may also be due to the higher inputs resulting in excessive growth making the crops more prone to lodging.
• For further results please see the attached trial report.

• Pale deep sand has inherently poor yield potential and given the high cost of the water repellence amelioration treatments it can be difficult to determine whether the investment is worthwhile.
• At this site the productivity gains have been sufficient to offset the costs and be profitable for each of the options tested.
• Claying despite being expensive does have the advantage of being long-lasting and reduces wind erosion risk. Shallower cultivation with offset discs or one-way ploughing can give profitable improvements but the example of the one-way plough demonstrated that the benefits can be reduced or even negated by wind erosion damage.
• It should be noted that other research indicates that improving the effectiveness of the seeding operation can give yield gains of similar magnitude or even greater than those measured for the offset discs without the erosion risk. Exploring this possibility is probably a first step for growers looking to manage repellence on these soils.

Intensive cropping systems rely on a high level of production management and prudent financial mangment to be successful, particularly in such a variable climate. Furthermore, such systems are increasingly reliant on agricultural chemicals. As well as being costly, the flow on effects of this reliance such as herbicide resistant weeds and changes to pest populations invokes thoughts about the long term environmental and financial sustainability of such a system.

• A study was made of various factors influencing the microbiological assay of available iron, zinc, copper, manganese, and molybdenum.
• Aspergillus niger was the test organism.
• The availability of 15 micronutrients was determined by bioassay from 278 surface and 164 subsoil samples from eastern Australia.
• The commonest deficiency detected was that of zinc, followed by copper, then by molybdenum, but deficiencies of iron and manganese were rarely found. Usually surface soils with a well-developed root zone were less deficient than subsoil.
• There was a fair correlation between the availability of zinc, copper, and molybdenum to A. niger (M.) and availability to plants, but none for iron and manganese • The fungus was able to obtain adequate amounts of micronutrients from a variety of insoluble salts or oxides of iron, zinc, copper, manganese, and molybdenum, some of which were known to be unavailable to plants .
• A number of soils inhibited the growth of the mould in complete medium. This effect was due to active fixation of added micronutrients, especially in soils rich in calcium carbonate and in "red loams".
• No evidence was obtained that microbial fixation of trace elements occurred in deficient soils; but most major and minor elements were fixed by microorganisms in very deficient, acid-washed, quartz crystals, with the exception of calcium, which was not significantly affected, and of iron and zinc, which were released by microbial activity from the minute amounts of contaminants present.

The trial was dogged by non-wetting and kangaroo grazing problems and so the bioassay of the residual effect of the original source of P treatments was poor..

Recoveries of applied phosphorus in the surface layers was poorest for the water soluble, plant available source superphosphate which had large leaching losses below 50 cm.  the less immediately available but citrate soluble source retained more P in the surface layers while the very insoluble C ore source produced poor growth but had only very low P leaching to depth.  The compromise in choice of source, between plant availability and leaching into the ground water and subsequently the waterways, is  well illustrated by this trial

As a rule, soil fertility factors (non-wetting, organic carbon, CEC, soil organic nitrogen, acidification etc were all more affected by length of pasture ley than by pasture composition and cumulated production.  Cross plot transfer of surface soil may well have affected this finding..

Carbon is generating plenty of interest at present and the project aims to answer questions around increasing organic carbon in agricultural soils through the addition of carbon source. It would be expected that the results will show minimal impact on soil carbon levels in the first year of trialling however will to be tested by the Facey Group in continuance to the project. Harvest results however require further investigation with such variance between the remainder of the paddock and the treatments within the trial.

• Plant density counts were estimated on the 3rd August 2012 by counting 8 x 1 metre rows along each treatment.
• The treatment without Bio Char, there were counted 126 plants per square metre
• Where Bio Char was applied, there were 130 plants per square metre. 
• There were no replications of the treatment applied, so it is difficult to conclude if biochar application was beneficial in plant establishment.
• Subsequent visual observations and ratings were done on the 25th September 2012 with no difference noticeable.  The inherent variation across the site mad it difficult to gain adequate measurements at this site.
• We were not able to detect any difference in grain yield between untreated (nil) and the biochar plot.

The next step is to engage a Carbon Farming service provider, to work with the proponents to prepare a submission to register both a revegetation project and a natural regeneration project with the Emissions Reduciton Fund.

The laboratory results suggest that the inoculum load of the crown rot pathogen, which is normally stubble-borne, may be significantly reduced in the soil within 3-6 months of application of the control fungus to the stubble.

The West Midlands site had an average yielding year for the Moora area. The Liebe Long Term Research Site had a good growing season in terms of rainfall and seasonal distribution. The average yield was about 50% higher than previous wheat trial years. This was similar to Forrestdale which also had good rainfall and seasonal distribution.

On average, all Bioprime treatments combined resulted in a 4% yield increase. Treatment 2 (foliar Bioprime and granular fertiliser) performed best, achieving a 10% yield increase averaged across the three sites). At the WMG site, five Bioprime treatments resulted in positive yield responses whereas this number was lower at the Liebe site (2 treatments). With data corrected for outliers, all Bioprime treatments resulted in a positive yield response. Given that the Liebe site, relative to the WMG site had a higher soil pH, and higher pre-seeding phosphate and exchangeable cations concentrations (Table 2), an average higher yield was expected and achieved here compared to the WMG (3.36 t/ha and 2.15 t/ha, respectively in unamended control treatments). Thus, the higher soil quality and soil health present at the Liebe site combined with the good 2016 season in terms of rainfall likely narrowed the yield gap.

As such any management options aiming to close the gap between actual and potential yield, would have had less scope to achieve this at the Liebe site in 2016. In contrast, the lower soil fertility at the WMG allowed Bioprime to more consistently improve crop production. The 2016 data suggest the opportunity to improve yield on a poor soil in a poor year is greater than on good soil in a good year.

Ongoing research will continue to further develop Bioprime technology as a tool to improve soil biology and maintain plant health and yield. There is a substantial database of microbiological and yield results which continues to expand with the expectation of understanding the links between root and plant colonization by beneficial bacteria and fungi with Bioprime application and growth improvements.

For the current information please contact Nimesha Fernando - 0434871969

Table 1 shows there was no benefit in applying black urea at 75kg/ha or white urea at 75 or 100kg/ha over the control.

• Where blackleg disease pressure is low, fungicide application is not necessary.
• The greater the amount of canola grown, the more likely is an infestation of blackleg.
• Consequently, in 2012, blackleg disease pressure may increase in the Wimmera and Mallee.
• A buffer of 500m from the previous year’s canola stubble is desirable when selecting canola paddocks.
• Growers should utilise the “Blackleg Risk Assessor” and the current “Blackleg Ratings” on the GRDC website.

• Blackleg internal infection was found in many varieties including some varieties that had higher levels than would be expected.
• Due to the good winter and spring, the level of yield loss at a certain level of internal infection was much lower than measured in 2008.
• Farmers need to cut canola stems at windrowing time to assess the level of blackleg.

• Blackleg internal infection was found in many varieties inclding some varieties that had higher levels than would be expected. 
• Due to teh good winter and spring, the level of yield loss as a certain level of internal infection was much lower than measured in 2008.
• Farmers need to cut canola stems at windrowing time to assess the level of blackleg. 

• WA2211 had lower disease severity and slower build up of blackspot than Kaspa and Alma,
  however this was not reflected in final grain yield due to dry spring seasonal conditions.
• P-Pickel T slows the blackspot epidemic during the early stages of the crop growth. The effect of P-Pickel T wears off and disease levels are no different to untreated controls beyond 12 weeks after sowing.
• The blackspot epidemic spreads further in the crop during flowering and podding, by spore
  splash (demonstrated by trap plants placed at Kingsford trial). Fungicide sprays at this stage, to stop the infection on upper foliage and stems, may be beneficial in higher rainfall regions. This needs to be tested in trials by timing spraying with spore release.
• Concept trial methodology was successfully developed to assess wether field pea lines with
  improved blackspot resistance levels can be sown at earlier sowing dates than currently
  recommended. However further evaluation is required on WA2211 to assess wether its black spot resistance improvement is significant enough due to the dry seasonal conditions which prevailed in 2007 . This will occur again in 2008.
• The importance of an additive effect of varietal improvement, seed dressing and foliar sprays in allowing earlier sowing is not fully understood and requires further evaluation in a year more favourable for disease infection and spread.

• The risk of blackspot is influenced by many factors of which seasonal conditions play a significant role in disease outbreak as was observed in this trial.
• Fungicide use to control blackspot is one of the strategies to minimise the disease.
• Although there was no effect of fungicide treatment on yield, previous trials have shown that crops sown into high blackspot risk and with a high yield potential can benefit from a fungicide strategy of P-Pickel T seed dressing combined with a mancozeb spray at 9 nodes growth stage followed by a second spray at early flowering.

• Early sowing plus large numbers of airborne spores caused severe blackspot infection in pea crops in 2009.
• Winter and spring rain increased severity of blackspot in the pea crops.
• Airborne blackspot spore numbers are expected to be high in 2010 since pea stubbles have severe disease loads.

In 2008, the optimal strategy for yield was the spilt application treatment of 40kgN/ha (urea) at GS33 and 40kgN/ha (urea) at GS39, which yielded 5.96t/ha. However, the optimal strategy for profitability was the single application treatment of 40kgN/ha (urea) at GS33, which returned a profit on investment of 15% or $10.76/ha. Therefore, it is questionable whether it was worth applying any nitrogen at all in this particular case, as the profit is marginal compared addition risk and outlay. Growers should be aiming for at least a 50% profit on investment, if not higher. As a result, the untreated nitrogen strategy appears the most rational decision given the 2008 scenario.

• Acidic soil layers below 5 cm adversely affect root growth and architecture, nodulation, plant vigour, N2
fixation and yield potential of acid-sensitive pulses.
• Moderately (pHCa 4.6–5.0) and severely (pHCa <4.5) acidic layers in the 5–20 cm soil profile are not detected using soil samples collected over standard profile depths of 0–10 cm and 10–20 cm.
• Finer sampling at 5 cm intervals is recommended to detect pH stratification.
• The current standard industry practice of spreading lime with no incorporation and sowing with knife point press wheels or disc seeders confines the lime effect to the surface layers.
• Careful paddock selection and forward planning is required to correct pH stratification in the topsoil (0–10 cm).
• Lime application and incorporation with a full cultivation operation at least 6–12 months before sowing acid-sensitive species could be necessary.
• Appropriate lime rates should be used to ensure pHCa >5.5 in the entire top 10 cm layer.
• The effect of pH stratification on more acid-tolerant species, including canola, lucerne and cereals, should also be monitored.

• Application of nitrogen based fertilisers will increase both feed quality and quantity.
• There is limited evidence of any nitrate leaching occurring.
• Encouraging responses from the slow release forms of Nitrogen – if a commercially form becomes available it may be worth considering – depending on price.
• Most economical responses come from urea @25 and 50 kgN/ha.

Cereals can be successfully established into existing stands of lucerne to increase winter production without compromising summer
production of the lucerne. The choice of cereal will influence the amount of winter and spring production.

• Boron (B) efficiency of oilseed rape (Brassica napus) and mustard (B. juncea) genotypes was determined on a low B soil at Mt. Compass, South Australia.
• B efficiency was observed in oilseed rape genotypes, Zhongyou 821, Dunkeld and Zheyou 2, and in mustard genotypes Pusa Bold and CSIRO 6.
• Genotypes grown in the field were also grown under glass-house conditions, in pots filled with pre-washed sand extracted from the Mt. Compass field site.
• Two B treatments, one B adequate (0.25 mg B /kg soil) and one B deficient (imposed by omission) were used to indicate whether vegetative response to B could predict final yield response and provide a more convenient selection criterion for identifying B-efficient germplasm .
• Vegetative response of 35 d old (D35) genotypes grown in pot culture closely reflected field response, indicating the expression of B efficiency traits in early growth, and its potential use in selection.

• The level of genotypic variation in tolerance to low boron (B) supply was investigated in solution culture grown, 10 day old (D10) oilseed rape (Brassica napus L.) plants, by using a rapid screening technique whereby root length, root elongation rate and total root dry weight were used to indicate plant response to B.
• Root length proved more reliable in determining genotype responses, and was used to characterise a total of 61 genotypes, of which Huashuang 2, Nangchang rape, Huashuang 1 and Zhongyou 821, and to a lesser extent, Zheyou 2, Dunkeld, Xinza 2, Nangjin 2051, 92-58, 92-13, and Awassa 115 exhibited some form of tolerance to low B supply.
• The genotypic rankings based on this early vegetative response corroborated with field based B-efficiency.
• The results demonstrate the expression of the B-efficiency mechanism in the early vegetative stages of plant growth, and establish the value of root length as a selection criterion for B-efficiency in oilseed rape.

Green manuring canola or mustard has not been proven to be beneficial following wheat crops in the southern Mallee.

• Brassica carinata is a crop similar to canola that may be used to produce biojet fuel.
• Carinata is grown in Canada over summer but is very late flowering and taller when grown under our winter conditions.
• Earlier flowering carinata lines were selected in 2017 and tested in 20 yield trials in 2018.
• Several carinata lines have produced higher grain yields than canola at Bordertown.
• Future studies will develop an agronomic package to optimise carinata production.
   

• Brassica juncea has the potential to be grown on a substantial area of low rainfall cropping country in South Australia with a likely area of up to 165,000 ha per year.
• Production may be expected to vary from year to year based on the timing of the seasonal break.
• Previous trials have shown that under low yield conditions, B. juncea can produce higher grain yields than canola.
• In the past two years with mild, wet conditions canola has performed relatively better than B. juncea.
• We are starting to see more blackleg occurring in low rainfall regions as the area sown to canola increases. It is not yet enough to cause problems but we need to keep our eye on it.
• Even more canola varieties have been released that may be good options in low rainfall areas.

Wheat yields were highest when grown after chickpeas or lupins at both low and moderate phosphorus (P) sites. Benefits provided by the previous chickpea or lupin crops could not be attributed to an increase in residual P sources alone.

From the sequences gathered from the survey group, 70% of the hectares planted were to cereals, with the balance to break phases. This appears to be a little higher than the average at around 60% to cereals. All growers surveyed noted flexibility as important to each rotation. Meaning longer sequences were often subject to change. Rotational changes are predominantly driven by weeds burdens and seeding conditions/seasonal outlook.  
 

• Two Clearfield varieties, Pioneer 44Y84 and Pioneer 45Y82, exceeded 2.5 t/ha at Mt Cooper.
• There were no standout varieties in the Triazine Tolerant (TT) and Conventional canola varieties at both Minnipa and Mt Cooper.
• Juncea canola and Biodiesel canola produced lower yields than in the past compared to traditional napus canola due to above average rainfall year.
• No significant difference between the newly released pea lines at Mount Cooper.
• Break crops were successfully grown at Penong in 2010.

• Field pea, vetch, faba bean and lentil had 3-125% higher biomass yield and 51-110% higher grain yield than chickpea and canola at Minnipa, 2018.
• Current high demand and grain prices for faba bean meant they were the most profitable break crop species.
• Low grain yield of canola (0.43 t/ha) and chickpea (0.39 t/ha) resulted in these crop species not being profitable as grain crops.
• Field pea and vetch, in particular, have multiple alternative end-use options in dry seasonal conditions that can be utilised to recover crop input costs.

• Wheat grain yield can be expected to be reduced by around 0.5 t/ha for every tonne of in-crop grass weed dry matter present in spring.
• Wheat following break crops were consistently more profitable than wheat on wheat. This in part reflected the  relatively low wheat grain prices experienced during experimentation, and the high returns for canola, but was also related to the efficacy and costs of ryegrass control.
• Growing pulses for brown manure (Bm) lost money in the year that they were grown, but achieved excellent weed control, provided high inputs of N and a residual carry-over of soil water, and more ground cover than if they had been cut for hay.
• In the presence of a high density of herbicide resistant ryegrass a ‘single break’ was not adequate to reduce weed seedbanks and subsequent in-crop weed competition. ‘Double breaks’ (two broad leaf break crops, or break crop - cereal hay sequence) reduced ryegrass seedbank numbers to manageable levels and were amongst the most profitable sequences.
• Break crop choice and selection should be based on individual farm management and ability to manage the various break crops options in the rotation. If growers remain flexible in break crop and end-use decisions, and make suitable choices, risks associated with producing them can be greatly reduced.
• A cropping program that includes break crops is likely to be more sustainable in terms of N inputs and risk of build-up of root diseases than continuous wheat, and provided cheaper, more effective strategies for controlling herbicide resistant grass weeds.

• Field pea had higher biomass and grain yield production than other break crop species at Minnipa, although @RISK analysis suggests field pea is only profitable as a grain crop in 41% of years.
• @RISK analysis model outcomes indicate chickpea, vetch hay and lentil are lower risk break crop species, and are profitable in more than 50% of years.
• Field pea and vetch have multiple alternative end-use options in dry seasonal conditions that can be utilised to recover crop input costs and salvage a financial return.

 

The grain yield of wheat sown after pulses were 300 kg/ha higher on average compared to wheat sown after canola. The yield gap between the canola-wheat rotation and canola-pulse rotation was a result of reduced soil nitrogen levels following harvest of the break crop phase in 2018.

The grain yield of wheat sown after pulses were 300 kg/ha higher on average compared to wheat sown after canola. The yield gap between the canola-wheat rotation and canola-pulse rotation was a result of reduced soil nitrogen levels following harvest of the break crop phase in 2018.

Biomass and grain yield performance of varieties differed between environments, particularly when there were major differences in soil characteristics and rainfall.

• Crop sequence experimentation undertaken in Central West NSW in 2011 and 2012, has demonstrated that crop sequences which include a brassica or legume break crops can be as profitable as, and in many instances more profitable than, continuous wheat.
• Growing pulses for hay was found to provide high quality feed as good as from cereals but hay from canola was less nutritious. However, canola hay provided an alternative option in cases where a possible crop failure is likely due to adverse weather.
• Growing pulses for hay was found to be profitable across a range of season types, achieves excellent grass weed control and provides greater N inputs and higher carry-over of soil water than when the same crop is grown for grain.

• Average wheat yield gains were approximately 0.6 t/ha in the first year after a break and the size of this yield gain was similar in high and low yielding seasons.
• Second year break effects were generally in the order of 0.3 t/ha and third year break effects 0.1 t/ha, resulting in a total of approximately 1 t/ha more wheat being produced following a break compared to continuous wheat.
• The effect of breaks on subsequent wheat yields is usually more consistent across soils, seasons and break type than the yield of break crops.
• Cumulative gross margins from wheat following legume, brassica and legume-based pasture breaks were generally much higher than continuous wheat, but the overall profitability of including breaks is strongly determined by the high variability in the relative profit from the different break options on different soils in the year that they are grown.

• Canola produced the highest gross margin of all break crops grown in 2010.
• Wheat grown following peas and vetch had the highest grain yields and protein concentrations.
• Crop sequences of canola, pea grain or hay and vetch following by wheat have gross margins equal to or higher than wheat-wheat and fallow-wheat on both sand and clay soils.

Wheat consistently yields more following a broadleaf break-crop than following wheat or a long-fallow. Wheat yields more when grown after legumes (peas and vetch) than after brassicas (mustard, canola). Wheat yields are consistently higher following vetch than all other break crops. Canola, pea hay or vetch hay followed by two wheat crops were more profitable than continuous wheat or fallow followed by two wheat crops.

Canola, juncea canola, vetch and pea hay were all more profitable than wheat on both sand and clay soil types.

Brassica or legume break crops can be as profitable as wheat. In most cases, the higher the legume dry matter produced, the greater the amount of nitrogen produced. Strategic timing of operations such as hay cutting and brown manuring provide an opportunity for improved weed control.

Wheat yields in 2012 were higher following hay, brown manure or fallow in 2011, probably due to extra water conserved in these treatments. Crop sequences including a break crop are at least as profitable as continuous wheat, with some examples of substantial profit gain. Where continuous cereals are grown, cutting wheat for hay can provide substantial yield and profit benefits to subsequent wheat in seasons with low growing season rain.

Wheat yields in 2012 were higher following hay, brown manure or fallow in 2011, probably due to extra water conserved in these treatments. Crop sequences including a break crop are at least as profitable as continuous wheat, with some examples of substantial profit gain. Where continuous cereals are grown, cutting wheat for hay can provide substantial yield and profit benefits to subsequent wheat in seasons with low growing season rain.

The time from sowing to emergence represents a key period in the development of high-yielding wheat crops.

• The +Zn treatment received 7 kg Zn/ha at sowing plus 2 foliar sprays of 0.33 kg Zn/ha.
• Generally, yield responses to Zn are greater in durum and bread wheat than in barley.
• The most inefficient lines of wheat and barley showed distinctive symptoms of Zn deficiency, such as reduced growth, pale leaves with chlorotic and necrotic lesions along the mid-vein.
• In 1999 a dry spring limited the yield response to Zn to about 0.5 t/ha, whereas, in 1998 yield increases up to 1 t/ha were measured.
• The disparity between the vegetative and the yield responses has tended to be greater in barley than in wheat.
• The wheat cultivars Goldmark and Kukri have low Zn efficiency, whereas the widely adapted, high yielding cultivars Trident, Krichauff and Worrakatta are Zn-efficient.
• Within barley, a number of Japanese breeding lines (eg SBWI-1) are very inefficient, but many current cultivars from SA as well as Arapiles (Vic.) and Stirling (WA) show a high level of efficiency.
• Pot assays for Zn efficiency have been developed and generally show similar rankings to the field tests.
• Wheat double haploid populations derived from the cross between Trident (efficient) and Songlen (inefficient) have been produced to develop molecular markers for Zn efficiency.

• Highly winter active lucerne varieties had better establishment than the winter active or semi dormant varieties.
• Many of the breeder's lines showed better establishment than the commercial cultivars.

Chickpeas have not been widely grown in the Brim district since the outbreak of ascochyta in 1998. This trial has shown it is possible to grow chickpeas in the district and newer lines with improved disease resistance show promise for the future and would eliminate the need for a fungicide in this district. Improved disease resistance may also allow newer lines to be sown earlier, which is likely to have a yield affect – especially in shorter growing season districts such as Brim.

Trial conducted to continue evaluation into the use of chemicals to manipulate broad been plant architecture without decreasing yields.
• Unseasonably dry and warm conditions and resulting poor yields were not conducive for conclusive results.
• In three years of trials Ethephon reduced plant height without a significant yield penalty.

• Agronomic or chemical assisted canopy management could have significant benefits to fungicide penetration and efficacy, disease intensity, grain yield and harvestability.
• Four treatments reduced height without a significant yield penalty: Clomazone, Paraquat + Diquat (High), Ethephon (applied 26 Aug) and Ethephon (applied 9 Sept).

• Agronomic or chemical assisted canopy management could have significant benefits to fungicide penetration and efficacy, disease intensity, grain yield and harvestability
• Two canopy management treatments (simulated grazing and a low rate of glyphosate) suppressed plant height with no significant effect on grain yield.
• All other treatments either caused a yield penalty or did not suppress plant height.
• Several herbicides, including glyphosate and imazamox show promise as growth regulators, but require revision of application rates.

Post-emergent herbicide was scored for visual damage on 26th September 2012. These results have been combined with yield data and the results will be discussed with Pulse Australia to look at future work in determining herbicide permits for Broad Bean crops.

• Liming to help reduce some of the inherent nutritional problems of low soil pH.
• Application of Molybdenum pre seeding to assist with nodulation.
• Improving nodulation by either increasing the number of rhizobia applied, ensuring rhizobia survival in those acid soils or ensuring both collar and lateral nodules develop.
• Early tissue testing and subsequent nutrient correction with foliar applications to overcome some of the deficiencies associated with lower soil pH.
• Raised beds for water logging control in wetter areas, or sowing the beans into a ‘hill’ rather than a ‘furrow’.
• Retention of cereal stubble to improve soil moisture status prior to and at sowing may assist with improving germination and nodulation.

If the time and costs incurred in sowing are compared to broadcasting in relation to the yields achieved it is more cost effective to broadcast then to sow. The BCG will continue work in this area in 2001.

• Pre-emergent herbicides were equally as effective at controlling broadleaf weeds as post-emergent herbicides in this faba bean trial
• Reflex® is a new pre-emergent herbicide option for control of broadleaf weeds with good residual activity and is effective at reducing weed density and biomass
• If a post-emergent herbicide is required Ecopar® is best for broadleaf weed control in non-imi-tolerant varieties and Intercept® is good for imi-tolerant varieties

• RR canola which was sown into plots to mimic wild radish produced 4.1 t/ha of biomass by maturity and reduced the seed yield of CBA Captain chickpea by 47% compared to weed free plots.
• Majority of the herbicides and herbicide mixtures registered 95-100% weed control efficiency against RR canola and produced similar seed yields to weed free plots. Application of flumetsulam 800 at 25g/ha at 4-5 node stage of chickpea reduced canola biomass by 99% and increased chickpea seed yield by 74%.
• Post-seeding pre-emergent application of a three-way mix of Simazine 900 835g + diuron 900 333g + isoxaflutole 750 100g/ha and post-emergent application of REDPI21 at 4-5 node stage caused significant seed yield loss of chickpea.
• Pre-emergent application of fomesafen, flumioxazin, terbuthylazine + isoxaflutole, and simazine + diuron + isoxaflutole had no significant negative effect on root nodules of CBA Captain.

• Chickpea varieties - CBA Captain and Neelam showed similar competitiveness against broadleaf weeds. Competition of RR canola (mimicked wild radish) and broad leaf weeds with these varieties to maturity accumulated 4.2t/ha dry biomass and reduced chickpea seed yield by 35% compared to weed free plots.
• Majority of the herbicides and herbicide mixtures registered 95-100% weed control efficiency against RR canola and broadleaf weeds and yielded on par with weed free plots. Application of flumetsulam 800 at 25g/ha at 4-5 node stage of chickpea reduced canola/weed biomass by 69% and increased chickpea seed yield by 25%.
• Incorporated by sowing application (IBS) of herbicides/mixtures appeared safer than their post-seeding pre-emergent application (PSPE). IBS application of fomesafen, flumioxazin, terbuthylazine + isoxaflutole, and simazine + diuron + isoxaflutole had no significant negative effect on root nodules of CBA Captain.

• Majority of the pre-emergent herbicides and herbicide mixtures registered 88-100% weed control efficiency against wild radish. Post-emergent application of flumetsulam 800 at 25g/ha alone at 4-5 node stage of chickpea reduced wild radish number by 86%.
• Interaction of post-emergent flumetsuam with pre-emergent herbicides/mixtures for wild radish control was positive, whereas for chickpea seed yield it was negative in majority of the cases.
• Pre-emergent application of flumioxzin alone and in mixture with other herbicides, BADPI21 and simazine + diuron + isoxaflutole caused 21 to 41% loss in chickpea seed yield.
• Pre-emergent application of fomesafen, flumioxazin, terbuthylazine + isoxaflutole, and simazine + diuron + isoxaflutole had no significant negative effect on root nodules of CBA Captain.

T

Although there were no significant differences between herbicide treatments in wheat yield the control plots yielded the lowest.

Choice of product depends on mix, population and size of weeds, crop safety and growth of the crop.

There was no effect on crop emergence from any treatment.
Climbing Buckwheat (Fallopia convolvulus) and Wireweed (Polygonum aviculare) were the key target weed species. In this trial, no treatment provided significant levels of control of climbing buckwheat at either assessment. Low levels of wireweed were apparent at the 69 DAA assessment with no apparent difference between treatments. However significant levels of control were found from all treatments following a germination in late August and early September. The poorest treatments for wireweed suppression were Balance 50 g/ha, Diuron at both rates, Balance + Simazine and the low rate of Terbyne. All treatments provided good control of turnip weed.

There was no effect on crop emergence from any treatment.
Wireweed (Polygonum aviculare) was the key target weed species. In this trial, no treatment provided significant levels of control of wireweed at 43 DAA. Wireweed populations were dense but patchy.

The use of Lexone on both barley and wheat was quite safe in 1996, spray conditions were quite good with moist soil and some dew on hte crop, and no heavy rain occurred within a week of appying the herbicie.

• Trifluralin can provide useful control of low levels of brome and barley grass.
• No crop damage was observed this season from Metribuzin/Diuron mixes applied pre-sowing.

• Brome grass is becoming more prevalent in the Victorian Mallee with adoption of no-till farming an dintensification of cereal cropping systems where few effective herbicides are available for control.
• The ecology of brome grass has changed, making it more problematic to control in crops.
• Aim for two consecutive years of control to deplete the seedbank of hthis troublesome weed.

• There was no significant difference netween any of the treatments.

There was no significant difference between the lentil counts, but there was a trend evident of some of the group C herbicides causing some slowness and even plant death. Rain events in the first month post planting were below average, it is likely that those herbicides that are known to have some level of toxicity to lentils (such as Metribuzin) were concentrated in the furrow and thus negatively affected some of the germinating plants.This apparent damage  highlights the importance of understanding how herbicides interact with the soil type, stubble loading and the planted crop.

Managing Brome grass populations in wheat is a challenge facing many growers but chemical control options have increased over the past two seasons with the introduction of Clearfield wheat technology and Atlantis herbicide.

• Knockdown treatment of Gramoxone offer good control of Brome grass but must be applied before the 0.5-leaf crop stage to provide sufficient crop safety. RoundUp is also used in some situations but because it is a translocated herbicide it can do significantly more crop damage.
• Lexone offers good in-crop control of Brome grass in both barley and wheat (Lexone is not registered in wheat and only registered for broadleaf control in barley) however the window for application is both small, and critical, for safe and effective use.
• Monza offers suppression of Brome grass (at the 1 to 3 leaf stage) in wheat but has long plantbacks that need to be observed.
• The introduction of Clearfield technology in wheat appears to offer another tool against Brome grass.

Non-chemical methods work hand in hand with chemical methods for controlling brome grass

Non-chemical methods work hand in hand with chemical methods for controlling brome grass