Effective deep application of phosphorus (P) and potassium (K) fertiliser relies on critical factors. Understanding how to tune important variables in deep applications is emerging from trials in the northern cropping region (central and southern Queensland, and northern NSW). The critical factors for successful deep applications include: placement product choice […]
What happens to gypsum or limestone when stubbles are burnt? Gypsum and limestone are soil amendments – sometimes spread onto paddocks before burning of crop stubble. Stubble or grass fires can affect limestone and gypsum in two ways: chemical changes due to high temperatures, and convective losses as ash rises. […]
Strategies to reduce Nitrogen (N) losses in Victorian High Rainfall Zone (HRZ) cropping systems are getting clearer. Recent research in south western Victoria examined rates of N applied, placement of fertilisers and nitrification inhibitors. This work is part of the national agricultural nitrous oxide research program, supported by the GRDC. […]
Annie McNeill from the University of Adelaide talks about the challenges in understanding what happens to the phosphorous returned to the soil in crop and break crop residues. Recorded at the National Soil Science Conference at the Melbourne Cricket Ground, November 2014. Further information National Soils Conference proceedings: Available P in topsoil […]
Fertiliser nitrogen may be lost from the soil in several different ways, including: ● ammonia volatilisation, ● nitrate leaching and ● nitrate denitrification. Factors affecting these losses include the fertiliser compound, fertiliser form, type of application, timing of application, soil properties, rainfall amount and intensity, and temperature and wind after […]
