Karoonda SA trials

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Trial	Contributor Funding sources	Year	Trial site

Break crops can provide over 1 t/ha of extra wheat over the three subsequent seasons Although cereal-intensive cropping has been demonstrated to be productive in the Mallee, there are situations where grass weeds, disease and high fertiliser costs may necessitate a break crop option. This trial was designed to evaluate the effect of a range of break crops and pasture over a range of mallee soils over 3 years of subsequent wheat. In replicated field trials at the Karoonda (Lowaldie) site, break crops including legume, rye, brassica and pasture were grown in 2009 and 2010 and followed by consecutive wheat crops until 2013. Wheat yield following these breaks were compared with a continuous wheat treatment. All treatments were applied at four positions in the landscape: hill (deep sand), mid-top, mid-slope and swale (heavy flat).	Mallee Sustainable Farming Inc. GRDC	2009	Karoonda SA
Research organisaton
Effect of fertiliser sown with wheat seed on Mallee soils There are major opportunities to improve crop performance on Mallee sands, opportunities to invest in the transformation of poor sands and opportunities to improve yield through more targeted agronomy of sandy soils. In 2015 wheat plant establishment was significantly better on non-wetting sand (crest and dune) plots that received no fertiliser with the seed compared with those that received 50 kg DAP/ha. Similar effects were measured in trials established by Jack Desbiolles at Moorlands in 2015 (McBeath et al. 2016).	Mallee Sustainable Farming Inc. GRDC	2016	Karoonda SA
Research organisaton
Nitrogen cycling in cereal stubble retained systems To strengthen our knowledge on seasonal changes in the (1) biological value of stubble (2) mineralisation: immobilisation balance (ratio) and (3) the direct supply of N from stubble to crops as influenced by stubble management.	Mallee Sustainable Farming Inc. CSIRO GRDC	2015	Karoonda SA
Research organisaton
Rhizoctonia bare patch disease inoculum build-up in different cereal crops and varieties To determine the variation in the build-up of Rhizoctonia solani AG8 inoculum between cereal crops wheat, barley, triticale and cereal rye and varieties in a cropping system.	Mallee Sustainable Farming Inc. GRDC	2016	Karoonda SA
Research organisaton
Soil-specific nitrogen strategies To identify opportunities to reduce risk and increase profitability by evaluating the soils and conditions where continuous cereal systems perform best and where inputs can be most cost-effectively targeted	Mallee Sustainable Farming Inc. GRDC	2013	Karoonda SA
Research organisaton
Soil-specific strategies continue to pay at Karoonda To identify opportunities to reduce risk and increase profitability by evaluating the soils and conditions where continuous cereal systems perform best and where inputs can be most cost-effectively targeted. Trials were established at Karoonda (Lowaldie) to test soil-specific strategies and tactics for reducing risk and increasing profitability in cereal-based rotations over the 2010-2013 growing seasons. Potential management practices including nil fertiliser, district practice, increased sowing N, increased N applied in-season and pasture breaks in 2009 and 2010 were applied on 150m long plots running across a range of soil types covering a dune-swale system. Simulation modeling was also used together with field results to identify the best long-term strategies for soil zones.	Mallee Sustainable Farming Inc. GRDC	2013	Karoonda SA
Research organisaton
Sowing strategies to improve productivity on sandy mallee soils To determine whether the potential benefits of sowing on last year’s crop row to harvest any extra water and nutrition can outweigh risks of increased disease pressure and lead to better crop performance on Mallee soil types	Mallee Sustainable Farming Inc. CSIRO GRDC	2014	Karoonda SA
Research organisaton
Sowing strategies to improve productivity on sandy mallee soils Trials in the Mallee have highlighted the benefits of strong early crop establishment and nutrition, particularly on sands. Non-wetting (or water repellent) sands have presented additional challenges. Global Positional System (GPS) guided seeding is increasingly common and presents the opportunity for strategic placement of seed in relation to last season’s crop rows. Trials have been established at Karoonda and Loxton to examine when and where on-row (or near-on-row) seeding may have benefits over inter-row seeding in stubble-retained systems.	Mallee Sustainable Farming Inc. CSIRO GRDC	2015	Karoonda SA
Research organisaton
Testing pre-emergence herbicide options for brome grass on Mallee sand To test pre-emergence herbicide options for brome grass on Mallee sand.	Mallee Sustainable Farming Inc. GRDC	2015	Karoonda SA
Research organisaton