Six varieties of canola were tested to compare their responsiveness to urea. The varieties selected had different growth patterns, and the slow growing varieties such as the TT types showed a similar response in growth to the other more vigorous types. In this experiment, urea did not increase yield of any of the varieties tested, but oil contents fell for five of the six varieties with added urea, with ATR Hyden the exception. Given the poor yield response, little can be directly interpreted from these results, although it is reasonable to conclude that higher urea rates are less profitable with lower yielding types or on sites with low yield potential.

• Stubble rentention increased the severity of frost events in experiments over two years
• There was no difference in floret sterility due to stubble treatment, but grain yield was highest where stubble was removed by burning. 
• Stubble rentention reduced the amount of heat stored in the soil during spring. With less heat stored there is less capacity for energy release at night to buffer against frost damage.
• Consider management strategies that avoid frost (e.g. crop choice, sowing date, variety choice) where high stubble loads are retained at sowing. 

The application of compost at 2 t/ha did not result in higher returns and the response under compost plus fertiliser treatments could be attributed to the application of fertiliser. Spading did not return any further gains in terms of yield or quality at this site in 2013. The high cost of spading and compost in the first year, have negatively influenced profit outcomes. Depending on future yield improvements, these treatments may pay for themselves over the longer term.

No measureable changes in soil condition as a result of adding 2 t/ha compost were measured in 2013 and 2014 that would add value to the long term profit of this site.

Machinery used for applying compost caused some compaction and due to the dry post-sowing conditions, crop germination was very patchy. The trial site experienced significant moisture stress early in the season and may not be representative of seasons experiencing an average or wetter start.

The SOI phase signal for April-May (available on the last day of May) and subsequent monthly phases can provide useful information on the likelihood for rainfall for the rest of the season. It can be a very useful tool for assessing the risk of topdressing nitrogen fertiliser (especially if it is used in combination with other indicators such as potential of the crop; decile trend and stored soil moisture).

• There is little to be concerned about from implementing a strategic tillage provided:
  • That it is not frequent, say less frequent than once every five years based on the above.
  • That we consider the well-known risks for erosion such as slope, groundcover, and current weather, and the soil moisture at the time of the proposed tillage. Hence, we suggest leaving the tillage as late as possible so as to avoid the chance of erosive rainfall between tillage and crop establishment.

• No significant yield differences between seeders were recorded. This result could be misleading according to Andrew Slade.
• The analysed data indicates that Andrew Slade’s seeding system achieved significantly less protein than the other two farmers set-up.
• The raw means indicate there is still a likely difference between Slade’s and the other two farmers.
• This difference is possibly explained by the higher yields achieved by the Slade’s seeding system.
• Note: Statistical analysis not yet completed on replicates two and three.

• Zinc efficient and inefficient wheat cultivars were grown in soil cores in the glasshouse.
•  The calcareous soil had low micronutrient levels and high pH and boron.
• Although cultivar Gatcher produced 47% more dry weight of tops and double the root length density of cultivar Excalibur at maturity, cultivar Excalibur was much more efficient in terms of zinc uptake by roots and sevenfold more efficient than cultivar Gatcher in partitioning zinc to grain.

• Zinc-efficient (Excalibur) and inefficient (Gatcher) wheat cultivars grown in calcareous subsoil with low micronutrient levels, high pH and B.
• Treatments were +/- basal nutrients (exc Zn) and +/-Zn.
• Gatcher produced 47% more DM tops and double the root length density of Excalibur by maturity Excalibur was far more efficient in Zn uptake and seven times more efficient than Gatcher in partitioning zinc to grain.

There was no yield benefit using bio-degradable polymer film on late sown barley and field peas.

• New fodder shrub species have been successfully trialed in the UN.
• Perennials, including fodder shrubs will increase pasture production on poor, degraded soils.
• Grazing animals require a balanced diet with a variety of pasture species to ensure the correct balance of energy, protein and minerals.
• High stocking pressure for short periods is necessary to maximize pasture production of both the fodder shrubs and inter-row pasture.

• Poor growth of flax observed on "Bay of Biscay" (black clays) in Auburn area of South Australia.
• But soil type patchy through paddocks.
• Agricultural zinc sulphate was cheaper and as effective as calcined zinc in correcting the problem.

• The combination of Triazine Tolerant (TT) and Roundup Ready (RR) herbicide provided superior control of ryegrass and wild radish over individual chemistry treatments.
• Canola is an important rotational winter crop however, with increasing herbicide resistance across multiple chemistries in WA, growers are experiencing increasingly limited options with the current herbicide tolerance technologies available.
• Hyola RT® Technology allows the combination of strong knockdown and residual broad-spectrum herbicides from different herbicide groups and modes of action, targeting a wide range of weed species.
•  Hyola RT® will provide an important role in addressing the increasing Clethodim resistance problem.
• RT® dual herbicide tolerant Hybrids have now demonstrated their value as a new competitive integrated weed management (IWM) tool, also providing increased convenience and flexibility of in-crop weed control.

Results from the initial establishment season have again confirmed the ability of hardseeded legumes to grow and set seed under adverse seasonal conditions.  The value of indeterminate pattern of growth in facilitating additional seed set was also shwon with biserrula where following late spring rain, an additional round of seed set resulted in a more than doubling of overall seed production.Bladder, with a slightly deeper root system, and gland clover which is early maturing also showed b etter capacity to produce seed in challenging condition s compared to subterranean clover.  With production of a seed bank critical for pasture performance  in subsequent years, the performance of hardsseded legumes was very encouraging.

• The value of stored soil moisture at seeding in the Northern Agricultural Region of WA is not well understood.
• In trials so far, value of stored soil moisture at seeding has varied depending on season and soil type.
• In 2013, additional water at seeding increased yield by about 500 kg/ha at the sand site, and by 1000-2000 t/ha at the loam site.
• Trials such as these will help to unravel the value of stored soil moisture so that it can better be used as a predictor of crop performance and nutritional requirements.
• Available water at sowing is a poor predictor of expected yield and cannot be used as a simple tool for adjusting input levels. We need to develop an ability to understand when and why the water will be of benefit. 

For some, 1993 waws the best year ever. For others a disaster caused by mice, frost and the decision to plant a majority of barley crop.

1994. What a year! Let's hope that it's not repeated in 1995. For most farmers in the region, 1994 was the third lowest rainfall since 1945, or the fifth lowest rainfall ever.

For most farmers, 1995 will be remembered for high-yielding crops and excellent prices.

Overall, 1997 was tough, we were probably let out of jail twice during the year: as usual there were many lessons and opportunities.

What is important is never give up hope, never stop learning, listening or talking.

Please see report 

The good news is that we are all likely to experience on average 3 to 4 of these types of years in our farming careers, we now have one less to worry about.

2004 was a disappointing year in nearly every way we choose to look at it. For some, it was the worst financial drought they have had, worse than 2002, because they spent money on inputs right up till harvest. The good thing about the year was that, as droughts go, there was very little wind erosion because paddocks were not bare. All paddocks had enough rain to grow crops or pastures, enough rain to persuade farmers that every thing was going to be all right, right up till the bitter end.

Once again, "the year that was” attempts to capture what occurred across the Wimmera and Mallee. While I know very well what happened on our own farm, I can only try and summarise what has been experienced in the wider communities of the Wimmera and Mallee in yet another tricky year for farmers.

2006 can best be described as the year in which drought, water, climate change, the resources boom and the Cole Inquiry into AWB Limited dominated the headlines of our newspapers across the nation. I cannot remember a period in our history when rural issues dominated the minds of the nation to such an extent. As we know, attention from the press usually means that rural people are doing it tough.

The 2007 year can be summarized by the saying above. The essence of most farmer’s problems this year was that our crops looked so good in July that when no spring rain came the crops had to fall over. In fact we were lucky to get as much grain as we did. If the weather in October had not been cool then the result would have been far worse. I remember Nick Poole, at a workshop in August, saying the best thing that our crops could do, would be to drop a lot of tillers off - such was the potential.

At the beginning of the year the thought of another drought on top of the previous four in six years was too preposterous to contemplate. Never in our history has there been three droughts in a row and only a couple of times two in a row. With a La Nina forecast and record prices for grain, 2008 was looked forward to with great optimism. We needed only average crops to achieve good farm profitability.

• The application of N increased yields of all cereals grown on a wheat stubble.
• The application of fungicides controlled leaf diseases in wheat and barley, and increased the grain yield of wheat.

• Across three years addition of trace elements and fluid fungicide in-furrow did not provide increases in emergence, tillering or final yield - although this contradicts what other farmers have reported.
• Liquid N at sowing can improve crop emergence and early vigour, especially under dry conditions .
• Full liquid systems did not provide a profit benefit (due to higher input costs) even where they did provide increased yield which was not in all years.
• Recommendation most likely to provide higher returns for this area will be an in-furrow fertiliser system that incorporates some elements of liquid nitrogen and phosphorus fertiliser ,trace elements, fungicides and granular phosphorus and nitrogen fertiliser.

• Hand weeding wild radish is feasible if you can pick the right paddock with a low enough weed density. The trick is picking the right paddocks.
• This is a viable practice where wild radish density is approximately 5 to 10 plants/ha or less. At very low densities this practice is both economically and logistically feasible.
• A side-by-side all terrain vehicle (ATV) with a trailer would be ideal. With this equipment, teams of two could work together with the driver picking radish given the ease of stepping into and out of these vehicles. This would reduce the cost and make life easy and safe for the workers.
• Spray a boundary lap and any areas where high density is expected. We encountered high radish densities near the edges of paddocks which slowed down the process and increased the cost. These sprayed areas can also be hand weeded to remove resistant survivors.
• Spend time assessing the paddocks. We managed to make accurate wild radish density assessments in one paddock. The problem was that we didn’t do enough assessment and we were faced with surprises in the other two paddocks.
• Drones /weed detection will have their day. We have un-sprayed paddocks that now have as few as 2 wild radish per hectare in crop. It is simply not worth spending upwards of $25/ha to spray these crops not to mention the environmental issues. These paddocks are currently rare but they show what is possible.

• Thrips pressure reached the positive control threshold of one thrips per plant in late October while plants were at the cotyledon to 1-leaf stage.
• Thrips pressure reached the industry threshold of 10 thrips per plant in mid-November when plants were at the 4–5-leaf stage.
• Onion thrips were the dominant thrips species observed during monitoring.
• Western flower thrips (WFT) constituted less than 5% of thrips monitored.
• There was no yield difference between sprayed and unsprayed plots.

• Thrips pressure was lower in the earlier planted Whitton site.
• Thrips pressure reached the industry control threshold of 10 thrips/plant on 3 November while plants were still at the cotyledon to 1-leaf stage at the Darlington Point site, and only in some plots at Whitton on 9 November and most plots on 23 November when plants were at the 6–8 leaf stage.
• Onion thrips were the dominant thrips species observed during monitoring.
• Western flower thrips constituted less than 5% of thrips monitored.
• There was no yield difference between sprayed and unsprayed plots.

High machinery loads and working when soil moisture is not optimal can cause topsoil and subsoil compaction.

This trial illustrated that there can be some significant benefits to deep ripping post sowing.

• The average yields peaked at the mid May sowing.
• Grain quality results were not available at the time of print, but will be available by the Crop Updates.

• Early sowing of barley may be an effective way of controlling ryegrass growth and limiting seed set.
• Results in wheat are more variable than for barley: at Wanilla, mid-May seemed the optimal time of sowing to reduce ryegrass with less effect obvious at Yeelanna.
• Higher seeding rates also followed the same trend, with little ryegrass suppression benefit seen in wheat but a benefit evident in barley.
• Increasing seeding rate did not improve wheat yields significantly however barley (Fleet) did seem to benefit from higher seeding rates when sown late (mid-June).

• Early sowing of barley may be an effective way of controlling ryegrass growth and limiting seed set.
• Results in wheat are more variable than for barley: at Wanilla, mid-May seemed the optimal time of sowing to reduce ryegrass with less effect obvious at Yeelanna.
• Higher seeding rates also followed the same trend, with little ryegrass suppression benefit seen in wheat but a benefit evident in barley.
• Increasing seeding rate did not improve wheat yields significantly however barley (Fleet) did seem to benefit from higher seeding rates when sown late (mid-June).

• The highest yielding wheat variety in the time of sowing trial at Hart in 2010 was Yitpi (4.81 t/ha) sown on May 1st.
• Wheat varieties Axe and Gladius increased grain yield as time of sowing was delayed from May 1st until May 29th.

• The highest yielding treatment in the wheat time of sowing trial at Hart in 2009 was Gladius sown on the 30th of April.
• Later maturing varieties were best sown in early May.
• Axe is a good option for sowing in late May.

• Time of sowing was not important for yield in a wet rainfall year with a soft finish.
• Varietal selection was a bigger contributor to grain yield than the time of sowing in 2010. Choosing a variety well-adapted to a range of seasons will provide the greatest returns in the long term.
• Hindmarsh performs well in dry and wet years, consistently yielding well at all sowing times. Commander was the best of the malt varieties, yielding similarly to Hindmarsh. However, Commander may struggle in drier years.

• Early sowing of cereals, wheat, barley or oats, gave excellent grazing, hay or grain outcomes in 2009.
• The barley gave similar or better all round performance than the wheat or oats.

• Frame was the highest yielding variety when sown on the 1st May.
• As sowing date was delayed the early maturing variety Axe out yielded later maturing varieties Gladius and Frame.

• The highest yielding treatment was Calibre (RAC2721) sown on 28 April, achieving just over 4.6t/ha.
• Yields of over 4t/ha were consistently achieved by mid-slow to slow maturing spring wheats sown on 14 April and quick to mid maturing spring wheats sown 28 April. This coincided with flowering occurring during August.
• Despite being sown onto field pea stubble with 75kg N/ha applied, high yielding (4+ t/ha) treatments rarely met APW1 protein specifications, indicating that at these high yields greater nitrogen applications are required to achieve premium milling grades.

• TOS1 was sown in mid May and established well.
• TOS2 was sown late May but did not emerge until late June.
• TOS3 was sown late June and emerged a few days later.

• The ideal sowing time for soybeans in southern NSW is from mid-November to early December.
• Delaying sowing until late December can result in reduced grain yield.

For further information please see attached trial report.

• There was no significant pH changes within the first year of the demonstration however there was a trend for an increase in subsoil pH of 0.2-0.3 pH units following deep banding of lime.
• Predicted some of the lime deep banded in 2001 would remain undissolved and further pH increases should take place subsequently.
• Despite not significantly changing soil pH, there were first year yield responses in wheat following ripping, and the injection of lime.
• From a perspective to have lime react, it would seem imperative to have a deep tillage operation every few years.  Once a certain portion of lime has reacted, the residual lime then sits in a highly alkaline (caused by the dissolution of some of the lime applied) zone, within a highly acidic soil.  The chance of the excess lime present deep in the soil profile coming into contact with acid soil, to subsequently react and change more of the overall soil pH appears to be reliant upon some degree of mechanical intervention.

• A unique trial design (double up of each plot) was designed to allow destructive biomass sampling, and grain yield measurement
• This trial site was primarily used in a ‘screening function’- to evaluate any negative impact of lime of a variety of different legumes which was considered to be happening during the mid 1990’s. The key concern was to investigate if manganese deficiency was induced by liming
• The trial was sown to lupins in 1994, wheat in 1995.  Data not available
• Yield responses (negative) were apparently not noted in the early years following establishment of the trial.  Positive yield response did occur, several years post trial establishment
• The double up design allowed comparison of lime sources on many different species.  For example, in 1996, narrow leaf and yellow lupins were compared.  No data available
• In 1997 the trial was sown to wheat, no yield responses reported
• In 1998, the trial was sown to a diverse mix of new pasture legumes that were at various stages of evaluation prior to commercial release.  Some of the material screened, that subsequently was commercialised included Cadiz French serradella, Santorini and Charano yellow serradella, Casbah Biserrula, Prima gland clover and finally Bartolo bladder clover.  The primary focus of this work was to assess any negative impacts of lime on legumes.  No negative impacts reported.
• The inclusion of this trial into this sampling regime, was primarily because of the known (high rates) of lime subsequently applied by the cooperating farmer, and the focus to see if these high rates had changed soil pH deeper in the profile, which did not occur initially.

• There was rapid change in soil pH at this site in the first few years following the establishment of this trial.

• Despite the initial changes in soil pH, there were no positive grain yield responses between 1996-1999.

• In the 2000 wheat crop, there was a negative response to 2t/ha in 2000. 

• There has been a dramatic decline in soil pH across all treatments since 2000, despite a total of 4t/ha of lime being applied across the site (two applications of 2t/ha in circa 2009 and 2013.

• The source of the subsequent applications of lime applied by the farmer is unknown

• During the first few years of this trial being monitored, there were significant changes in soil pH due to the application of lime, and these changes resulted in significant grain response

• The ‘top up’ application (1.5t/ha, across all initial lime rates of 0, 1 and 2t/ha)) of lime applied in 2006 (10 years post trial establishment) has had dramatic impact on current soil pH.  Unfortunately, grain yields have not been monitored post the top up lime application.

• The 2016 pH measurements provide clear evidence inadequate lime has been applied to counter inherent and ongoing soil acidification. From a starting surface pH of 4.8 over a subsurface of 4.6 (in 1996), the highest rate of lime applied has been 2t (1996) and a further 1.5t (2006) is simply insufficient to lift soil pH above the DAFWA stated targets (5.5 over 4.8).

• Despite soil pH being under target, this trial provides a clear demonstration of the best soil pH profile being associated with the highest rate of lime application.  Collecting grain yields would be valuable

•    During the early years following trial establishment, there was no grain yield response measured
•    In 2004/2005, some 8 years post initial lime treatment, strong visual responses to lime became apparent
•    The ‘top up’ application (1.5t/ha, across all initial lime rates of 0, 1 and 2t/ha)) of lime applied in 2005 (9 years post trial establishment) has had dramatic impact on current soil pH, and the soil pH profiles now reflect lime applied
•    Only the highest rate of lime treatment (initial 2t/ha) followed by the 1.5t/ha in 2005 have a soil pH profile above the DAFWA recommendations (5.5 in the surface, over 4.8 at depth)
 

In 2012, early sown barley and canola gave the highest yields and gross returns. The early sown crops were able to withstand frosts and avoid the worst of the dry spring. Despite the different growth habit (erect vs prostrate) of many of the barley varieties, no one variety responded better to the altered sowing times or density than any other. Growers should plant all barley varieties at their chosen timing and plant density, and make their selection on the basis of other factors (e.g. disease resistance).

In 2012, early sown barley and canola gave the highest yields and gross returns. The early sown crops were able to withstand frosts and avoid the worst of the dry spring. Despite the different growth habit (erect vs prostrate) of many of the barley varieties, no one variety responded better to the altered sowing times or density than any other. Growers should plant all barley varieties at their chosen timing and plant density, and make their selection on the basis of other factors (e.g. disease resistance).

Sowing early increased yields by 0.5t/ha at Watchupga East and Horsham. Corack and Mace topped the yields at Watchupga East. Cobra and Mace were the highest yielding varieties at Horsham.

• The 2000 season was not conducive to the spread of leaf rust with the hot dry summer preventing the carry over of rust spores on volunteer cereals.
• For further results please see the attached trial report.

In this 2014 trial at Kojonup-West:

• Canola grain yield and gross margins were more dependent on nitrogen rates than the application timings.
• There was no effect of delayed nitrogen application on grain yield or gross margins up to 100 kg N/ha.
• At 125 kg N/ha, a significant yield and gross margins reduction was observed when nitrogen was applied as a 3-way split (50 kg within 8 weeks, 50 kg/ha at 12 and 25 kg/ha at 16 weeks after seeding) compared to when all of the nitrogen was applied within 8 weeks of seeding.

• Canola grain yield and gross margins were more dependent on nitrogen rates than the application timings.
• Delaying application of nitrogen after 8 weeks reduced canola yield.  The reduction was greater the higher the proportion of total applied N delayed.  
• Hyola 404RR produced significantly higher grain yield and oil than ATR Wahoo, but similar gross margins.

• We observed no significant differences in grain yield (GY) between any treatments due to low yield potential and reasonable soil nitrogen (N) levels at seeding.
• Timing of N application had no effect on GY. This is consistent with last years’ results at Wubin.
• Canola oil percentage decreased as N rate increased. High rates of N reduced oil significantly, consistent with last year at Wubin.
• The higher the rate of N the more rapidly oil percentage reduced, consistent with last year at Wubin.
• Gross margins (GM) decreased as N rates increased; all GM figures are negative due to poor GY, however, Sturt performed better than Pioneer 43Y23RR due to the higher seed costs associated with Roundup Ready (RR) seed.

• There were significant differences in grain yield (GY) between treatments (N kg/ha and timing), however, GY was particularly low in all treatments. 
• Total nitrogen (N) increased GY significantly up to 30kg N/ha.
• Canola oil percentage decreased as N rate increased. High rates of N reduced oil significantly.
• Applying N late (12 weeks after sowing (WAS) reduced canola oil percentage, however, not significantly.
• Gross margins decreased as N rates increased, but all gross margins (GM) were negative due to poor GY. Sturt had better gross margins than Pioneer 43Y23RR due to the higher seed costs associated with RR seed.
• Pioneer 43Y23RR produced higher GY at all rates and timings of applied N other than 10N seeding and 20N 12WAS.

• Canola responded to N applied as late as 12 weeks after seeding but not as much as to N applied at 4 or 8 weeks.  Hyola 404 RR and CB Telfer responded similarly in terms of yield.
• Nitrogen reduced oil %, and late N reduced it more than early N.  Oil was more sensitive to applied N in CB Telfer than in Hyola 404 RR.
• Grain yield continued to respond to 100 kg N/ha but the highest gross margin was at 75 kg/ha in Hyola 404 RR and at 100 kg/ha in CB Telfer.

In this 2013 trial;

• Canola grain yield responded positively to nitrogen application.
• Canola oil content responded negatively to nitrogen application.
• Therefore a wide number of treatments produced equal highest gross margins.
• The lowest rate of nitrogen treatment to produce maximum returns was 25 kg N/ha applied 4 weeks after sowing.
• We found treatments applied 12 weeks after sowing when the canola was flowering produced. similar results to applications applied at 8 weeks after sowing – which is the industry norm.
• Hyola 404RR produced higher oil but equal yield and gross margins to CB Telfer.

In this 2013 trial

• Time of nitrogen application had a minor effect on grain yield, oil and gross margins

applying 50 kg N/ha in a split application with 25 kg N/ha applied at seeding and 25 kg N/ha applied 12WAS was the equal of any other treatment.

• Both CB Telfer and Hyola 404RR responded similarly to nitrogen rate and timing of application.

Consequently due to lower seed costs, CB Telfer produced on average higher gross margins of $415/ha compared to $307/ha for Hyola 404RR.

• Canola grain yield increased with nitrogen application up to 50 kg N/ha
• Timing of nitrogen application had no effect on grain yield
• Canola oil decreased as nitrogen rate increased
• Applying nitrogen late (12 weeks after sowing) reduced oil%, but only if total N applied was 50 kg/ha
• Overall gross margins were similar at all rates of applied nitrogen or timing of nitrogen application - due to the decline of oil% as nitrogen increased
• Hyola 404RR produced higher yields, oil and gross margins than CB Telfer TT - at all rates and timings of nitrogen application.

• Grain yield responded to applied nitrogen up to 70 kg/ha.
• Oil did not decrease as nitrogen rate increased, unlike what we have observed at other trials – probably a reflection of the continued grain yield response to N.
• Positive gross margin returns were seen at 40-70 kg/ha of applied nitrogen.
• Overall when nitrogen was applied did not alter the response to nitrogen – but avoid putting the majority of N at 12 weeks.

• Pioneer 43Y23 (RR) had higher grain yield, oil yield (kg/ha) and gross margins, than Sturt (TT).
• Grain yield responded to applied nitrogen up to ~ 40 kg N/ha.
• Both varieties responded similarly to applied nitrogen with no variety x N rate interaction for grain yield. 
• Oil yield and gross margins did not respond to applied nitrogen.
• Timing of nitrogen application did not alter the response to nitrogen of both varieties for GY, oil %, oil yield or gross margin.

• With grain yield of less than 1 t/ha, there was only a small grain yield response to applied N and no economic response to applied N.
• Top-up N at 12 weeks gave a similar response to top-up N at 8 weeks.

• With grain yield of less than 400kg/ha, there was no grain yield response to applied N and no economic response to applied N.
• At ‘low rainfall’ N rates of 30 kg/ha top-up N at 12 weeks gave a similar response to top-up N within 8 weeks.

• Pioneer 43Y23 (RR) perform better in terms of higher grain yield, oil yield and gross margins than Sturt TT, with both varieties producing similar oil %.
• Grain yield responded to applied nitrogen up to 30 kg N/ha.
• Maximum oil% was produced with no applied nitrogen.
•  Gross margins also responded to nitrogen application up to ~ 30 kg N/ha after which further increases in nitrogen led to no further financial gain.
• Overall when nitrogen was applied it did not alter the response to nitrogen of both varieties for GY, oil, oil yield and GM. 

•  In a dry year, there was no economic response to applied N.  

• Grain yield responded to applied nitrogen up to 30 kg N/ha.
• Highest oil %, oil yield and gross margins were obtained with no applied nitrogen.
• When nitrogen was applied, did not alter the yield, oil or $/ha response to nitrogen of both varieties.
• Thus 30, 50 or 70 kg N/ha applied either in splits at seeding and 8 weeks or seeding and 12 weeks provided similar responses.

The Cunderdin trial saw Pioneer 43Y23 (RR) perform better in terms of higher grain yield, oil yield and gross margins than Sturt TT, with both varieties producing similar oil %. Grain yield responded to applied nitrogen up to 30 kg N/ha.  As the rate of applied nitrogen increased the % oil in the seed of both canola varieties decreased at a rate of 0.02% oil per kg applied N/ha.  Gross margins also responded to nitrogen application up to ~ 30 kg N/ha after which further increases in nitrogen led to no further financial gain.  Overall when nitrogen was applied it did not alter the response to nitrogen of both varieties for GY, oil, oil yield and GM.   

Cu fertiliser greatly increased yield from 0.6 t/ha to 1.60 t/ha.  

In general oxide source was equal to or superior to the sulfate source in wet mixes. In dry mixes in the same trial Cu oxide was only 66 % as effective as the sulfate.

A recent development in diagnosing Cu problems by a technique of using the youngest fully emerged leaf. Copper concentrations of less than 1.3 ppm (mg/kg) in the yougest fully emerged tissue , suggest that soil Cu deficiency will reduce grain yield .

The tissue testing technique was used on arange of Cu trila in the district to confirm the method (UWA Lonragan, Robson , Snowball)

For the first time it has been possible to distinguish crop damage caused by Cu deficiency from that caused by other factors such as frost, drought and root rots which produce similar symptoms.

Cu fertiliser greatly increased yield from 0.6 t/ha to 1.60 t/ha.  

In general oxide source was equal to or superior to the sulfate source in wet mixes. In dry mixes in the same trial Cu oxide was only 66 % as effective as the sulfate.

A recent development in diagnosing Cu problems by a technique of using the youngest fully emerged leaf. Copper concentrations of less than 1.3 ppm (mg/kg) in the yougest fully emerged tissue , suggest that soil Cu deficiency will reduce grain yield .

The tissue testing technique was used on arange of Cu trila in the district to confirm the method (UWA Lonragan, Robson , Snowball)

For the first time it has been possible to distinguish crop damage caused by Cu deficiency from that caused by other factors such as frost, drought and root rots which produce similar symptoms.

There are no significant differences in yields between the control and the TM21 plots in either trial.

 

The 2007 growing season was extremely dry and proved extremely difficult for trials. BEST looks forward to seeing the trial evolve over the next few years.

For a full list of take home messages please see the attached trial report.

Please see attached trial report for take home messages.

• Soil applied fertiliser was and better than liquid urea or UAN applied with standard spray nozzles to the crops leaves.
• Both urea and UAN are equally as effective when applied to the soil.
• Growers should select the nitrogen product that most suits their farming system in terms of logistics and cost.

• This trial showed that timing of N application is critical to yield potential, this showed that early foliar N had greater significance than application of other nutrients like potassium and trace elements.
• The trial also showed that seed treatments can develop significantly greater root biomass than unapplied seed.

• One hundred barley lines from a world collection were grown in plant breeders' plots (4 rows x 5 m) on a severely manganese-deficient soil.
• Only 10% of the lines showed good tolerance of manganese-deficient conditions, which were severe enough to kill many of the entries in the tillering stage.
• Extreme sensitivity to manganese deficiency was shown by all progeny of CI3576, an introduction from Egypt, which has conferred considerable yield advantage and disease resistance on its progeny under more highly fertile conditions.
• In all, there were 20 lines from CI3576, including Corvette, and Galleon, a newly released high-yielding feed barley.
• At present, Galleon is not recommended for calcareous sands, pending further agronomic work on its manganese fertilizer requirements.
• The established variety Clipper and its relatives, and Forrest, were also sensitive to manganese deficiency. The tolerant lines fell into three genetically related groups, all of which had pedigrees going back to traditional English land races or their derivatives.

• Wheat, barley, triticale, canary seed, sorghum, sunflowers, millet and panicum were grown in a copper deficient clay soil in pots in the glasshouse.
• For rates of copper from 0 to 6 mg per pot for winter crops, and the same plus 60 mg per pot applied to the summer crops.
• A rate of 6 mg per pot was not sufficient to maximise yield from the winter crops but some are crops produced maximum yields when 60 mg per pot was applied.
• Significant differences intolerance to copper deficiency were apparent between varieties within crops.
• Only the summer crops in triticale produce grain when nearly all the lowest rates of copper were applied.

• A series of glasshouse experiments were conducted with a range of different soils planted to triticale, wheat or rye.
• In one experiment at pH 5 and pH 8.4, triticale was tolerant of flow copper at pH 5 like rye but sensitive to low copper at pH 8.4 like wheat.
• Copper concentration in shoots decreased as pH increased the effect was greatest in wheat and lowest in rye.
• In a similar experiment with zinc these relativities were maintained, that is rye was most tolerant of zinc deficiency and wheat least tolerant.
• In a third experiment in soils deficient in both copper and zinc, these relationships were maintained but adding zinc alone aggravated copper deficiency and decreased pollen viability and yield, while adding copper alone generally increased pollen viability and yield.

• In 2017 no consistent differences in wheat yield were observed among plots established with different sowing implements.

Tor top dressing to be effective on canola the following points are required:

• It needs to be applied to a crop with marginal soil N levels that has the potential to respond.It must be applied before the crop suffers an unreasonable yield potential loss due to N deficiency.
• This will usually mean top dressing before stem elongation.
• The crop also needs good growth conditions after top dressing so that it has potential to provide an economic response.

Large plot sites run by TOPCROP groups across the state generated many opportunities for discussing and fine tuning nitrogen management in canola. The season was the main factor influencing yields and gross margins. Nitrogen application of about 10-20 kg/ha for the Mallee and 10-50 kg/ha for the Wimmera gave best yields and gross margins at most sites in a difficult season.

• Although there was a very late break to the season, cooler conditions through September and October maintained good yields.
• Yield varied from 1.46 - 2.56t/ha. Yarrum, Kaspa and Excell were the highest yielding varieties.
• There was no significant difference between seeding rates, except for 16 plants/m2 which yielded significantly less than the other seeding rates. There were not enough plants to compensate for yield in the short season

• Although there was a very late break to the season, cooler conditions through September and October maintained good yields. The faster maturing varieties (like H46 and Ellison) performed much better than the long season varieties (like Rosella and EGA-Wedgetail).
• Yield varied from 2.9 - 4.4t/ha.
• The protein levels were generally above 12.5%, except for H45 and H46. High protein values were a result of small grain size and a shortened grain filling period. Very high values (15.5 -16.1%) were seen for long season varieties like Petrie, Rosella, Marombi and EGA-Wedgetail.

• Field peas yielded significantly higher then both lupins and vetch.
• Field peas and undersown barley had significantly higher gross margins than lupin and vetch.
• In terms of gross margins there was no significant difference between field peas/undersown barley, undersown barley/vetch and lupins/vetch.
• When choosing to grow a pulse crop the following management issues are critical: time of sowing, paddock selection, species selection and disease and pest management.

• Barley crops showing foliar symptoms of a disorder recognised as boron toxicity were analysed for boron and other nutrients.
• Samples were obtained from sites throughout the cropping districts of South Australia.
• In plants with characteristic foliar symptoms, the concentration of boron alone was sufficient to account for the crop disorder.
• The mean concentration in affected plants was 151 mg/kg and in control plants 23 mg/kg.
• Slight accumulations of sodium and chloride were associated with the disorder, along with slightly lower calcium concentrations.
• The nutrient balance was consistent with association of the toxicity with sodic and saline soils.
• Severe boron toxicity is widespread in barley crops in South Australia.

• Deep placed trace elements can be more effective than the same amount placed just below the seed.
• Foliar application of trace elements was just as effective as deep placement at increasing crop yields.
• Deep placement increased grain uptake of all nutrients compared to other methods of trace element application.

• Copper, iron, manganese, molybdenum, and zinc were analysed in 45 soil samples from the lower south-east of South Australia, an area well-known for trace element deficiencies
• Absolute levels of all trace elements except molybdenum were very low for most soils of this region compared to average values for other parts of the world
• For soils similar in respect to profile features, parent materials and drainage conditions, each trace element maintains some consistency in its total content in the soil.
• This was shown particularly in relation to the terra rossas and rendzinas.
• Terra rosses on dune limestone is distinguished by higher manganese and molybdenum from the groundwater rendzinas on marls, which have higher cobalt, copper, zinc and iron.
• Several trace elements, especially cobalt, copper and zinc, are significantly higher on the small area of soils developed on volcanic rocks.

• A potted history and review of research into trace element deficiencies in South Australia (PDF available).

• Laboratory analysis of 14 red brown earth soil profiles from South Australia.
• Molybdenum, copper and cobalt concentrations were all strongly correlated with clay content but manganese was not.
• Manganese concentration was correlated with the silt content.
• The relative mobility of the elements in soil was directly related to their position in the periodic table (excepting for cobalt) Co>Cu>Mo>Mn.
• Molybdenum concentration should change with surface clay content but not that for copper and cobalt.

• The document provides summary data for nine experiments examining a range of trace elements in the productivity of pastures over time, and some livestock deficiencies.

• There were no significant yield effects of foliar applied trace elements to wheat, barley, canola and lentils at the Woomelang site in 2001. The trace elements were applied as Zincsol, Coppersol and TopFoliar (which contains a mix of trace elements).
• The alternative nutrient product, Hibrix, had no significant yield effect on wheat and barley and depressed the yield of canola and lentils

• Fluid trace elements banded under the seed row is an effective system for delivering these nutrients to cereal crops.
• Rates of trace element application as banded fluids may be lower than for other seeding strategies and cheap sulphates can be used
• Mixes of trace elements as banded fluids are effective.
• Trial was not trace element deficient.