Department of Agriculture and Food (Western Australia) trials

To compare the effect of delayed seeding and seeding rates on the yield and quality performance of wheat varieties.

To assess amelioration options for water repellent sandplain soils.

To assess what clay rich subsoil application rates are required for overcoming soil water repellence and how this interacts with method of incorporation.

To assess the performance of newly released canola varieties in the West Midlands.

To assess the performance of newly released canola varieties in the West Midlands.

To evaluate the performance of the historical lupin varieties in the West Midlands.

To compare commercial seeding machines that have specifically been set up to sow sub-tropical grasses.

To assess amelioration of subsoil acidity using a range of tillage methods for incorporating surface applied lime into acidic subsoils and the impacts of tillage and lime on crop productivity.

To test modified one-way ploughs as a method of lime incorporation.

To evaluate the effectiveness of two bolt-on attachments to a deep ripping tine at lime incorporation.

To determine whether a profit can be achieved from incorporating lime in the year it is applied.

To identify the optimum sowing time for establishment of sub-tropical grasses to the east of Eneabba.

To further investigate rotary spading and other soil amelioration techniques on the yellow sand-plain soils west of Moora.

To determine the impact that grazing of crops in winter had on subsequent grain yield and quality, production factors such as weeds, disease and nutrition, and livestock carrying capacity.

To assess comparative effect of anthracnose on yield and seed infection in a range of varieties and advanced lupin breeding lines.

To measure the impact on crop productivity of combinations of lime and mouldboard ploughing on acidic deep yellow sand.

To determine how mouldboard ploughing (soil inversion), rotary spading and banded wetting agent affect the availability of soil nutrients.

To assess the impact of different seeding systems on crop establishment in water repellent soil.

To evaluate the influence of perennial row spacing and grass suppression on the performance of serradella summer sown into subtropical perennial-grass pastures.

To determine how soil inversion and banded surfactants change the availability of soil nutrients.

To identify suitable options for managing soil water repellence on sandy gravels.

Detailed measurement of soil properties and plant productivity over time following amelioration with one-off deep tillage.

To conduct a field evaluation of the stage 3 lupin cultivars and breeding lines.

Measure yield improvement in varieties from the Lupin breeding program.

To determine value of agronomic management (sowing rate and nitrogen) on production of quality grain for profitable wheat systems.

This paper aims to summarise the grain yield response and weed control achieved by a one-off soil inversion.

To assess water repellent soil amelioration options and to determine whether a one-way plough can be used to ameliorate non-wetting sand for much lower cost than mouldboard ploughing or rotary spading.

To compare and assess the effectiveness of one-off tillage treatments on soil water repellence, water infiltration, crop establishment and productivity on a water repellent gravel.

Deep placement of organic matter and impact on lupin establishment.

This trial aimed to compare the production of different annual legumes in the West Midlands and the associated seed loss to native budworm particularly in regards to serradella.

• To identify impact of amelioration on maintaining productivity of adapted varieties in a district.
• To compare effect of amelioration on soil pH.

To determine how serradella performs when introduced to a sub tropical pasture stand.

To look at the following soil amelioration treatments on water repellent pale sand:

• no amendment (nil);
• 3t/ha limesand; and
• 150 t/ha clay rich (31% clay) subsoil spread with a multi-spreader

To assess the second year impact of mouldboard ploughing on wetting up of water repellent soil and on lupin establishment and yield.

To compare two methods for the establishment of pasture legumes (i) summer sowing where dormant hard-seed is drill sown into the paddock after the crop is harvested; and (ii) traditional sowing where scarified seed is drill sown after the break of the season and knockdown weed control.

To evaluate effectiveness of ‘summer sowing’ hard-seeded serradella pod into established perennial grass pastures.

To evaluate the effectiveness of establishing annual legumes into established perennial grass-based pastures by 'summer' sowing of hard-seeded serradella pod.

To independently compare a range of agricultural foliar products on wheat at Badgingarra in a replicated trial.

To support growers with agronomic decisions such as sowing time and variety selection to enhance industry profitability through improved wheat yields and grain quality.

To characterise the residual value of different P sources and changes in soil fertility (SOC, CEC, pH, nutrient supply, non-wetting, compaction) after 30 plus years, using soil measurements and bioassay cropping.

This paper assesses the economic benefits of green manuring and the potential costs. It also investigates the circumstances in which green manuring will be profitable and those that result in losses to growers.

To assess the effects of physical, chemical and biological soil manipulation (or inputs) on soil organic carbon in relation to changes in long term crop yields and quality.

To compare an opportunistic break crop against fallow and wheat to better define the pros and cons of fallowing.

To compare an opportunistic break crop against fallow and wheat to better define the pros and cons of fallowing.

To improve crop production by determining the effect of sowing time and sowing rate on crop yield and grain quality risks of new wheat varieties.

To evaluate yields and quality of new and existing wheat and barley varieties and their response to N.

This trial is conducted to investigate the value of nitrogen on the profitability of new wheat varieties in early and late sowings in fallow/wheat system at Wongan Hills

To investigate the value of nitrogen on the profitability of new wheat varieties in early (dry sowing) and late sowings in canola/wheat system at Wongan Hills

The objective of this research is to determine the value of agronomic management (plant density and nitrogen) on production of quality grain for profitable wheat systems. Increasing plant density is a useful tool to increase the competitiveness of a crop against weeds, however, how will this influence grain yield and quality for the new wheat varieties.

To determine if there are any benefits to increased productivity and carbon cycling on a yellow sandplain soil through mechanical incorporation.