Nitrogen fixation by crop legumes reduces the need for fertiliser nitrogen (N) and emissions of nitrous oxide. Benefits from legumes can be maximised by using high-yielding legume varieties that are not constrained by poor management, insects, disease, weeds or nutrient deficiencies.
Updated critical soil test values will help improve test interpretation to inform better fertiliser decisions for the GRDC Western region.
Nitrogen fertiliser management
Fact sheet
Fact sheet from researchers from the University of Western Australia (UWA) who conducted glasshouse studies to investigate the short-term interaction between surface-applied lime and sulfate of ammonia on ammonia volatilisation, crop growth and yield.
Cation exchange capacity
Fact sheet
Cation exchange capacity (CEC) of a soil is a measure of the soil’s ability to hold positively charged ions.
Nutrient cycling in gravel soil
Fact sheet
In gravel soil, the carbon pool is concentrated compared to a soil without gravel.
Why is canola sulfur hungry?
Fact sheet
Canola has a three- to five-times higher sulfur requirement than other crops and pastures
Organic matter and nutrient supply
Fact sheet
Biotic and abiotic factors determine nutrient availability from decomposing soil organic matter.
Testing for dispersion and slaking
Fact sheet
Simple guide to testing for dispersion
