Category: Fallow

Deep placement of fertiliser delivers results

Mike Bell, expert in deep fertiliser placement, smiling in paddock

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
formulation
compatibility of compound products
soil […]

What happens to urea with high residue loads?

Question to @aucropnutrition via twitter
What effect do high crop residues have on spread urea? Does some of the applied nitrogen (N) get used to break down the stubble and therefore become unavailable to the plant?
When urea dissolves on the surface of the residues in humid air or dew it gets […]

Reducing Nitrogen losses in the High Rainfall Zone of Victoria

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.
Key […]

What happens to P from crop residues?

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 at break […]

Nitrogen volatilised – factors affecting how much is lost

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 application.
Field trials on northwest NSW […]