Topic: topdressing

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 […]

What can you do with waterlogged paddocks?

How do you make evidence-based decisions following excessive rain and slow soil water drainage? Where the crop is not a write-off, getting a handle on which areas of the paddock are in the best shape, and the yield potential for those areas is the most useful information to have.
Assessing crop […]

Three reasons why topdressing Nitrogen can fail

A crop’s nitrogen (N) requirement rises when rainfall increases the yield potential. Applying more N fertiliser to meet greater plant N demand is often appropriate, but crop uptake is not guaranteed. Understanding why can help tailor topdressing practices to increase the chances of the applied N boosting crop yield and […]

How to protect livestock from nitrogen toxicities

Stock grazing crops high in nitrate can develop toxicity disorders. Plant nitrate levels are directly affected by nitrogen (N) fertiliser rates. Targeting high grain yields with additions of nitrogen fertiliser can elevate nitrate levels in plants to dangerous levels for livestock.
What can be done to reduce risk to stock

Avoid grazing […]

How to review Nitrogen nutrition at 3 timely points in the season

John Angus is a researcher with the CSIRO and a mixed enterprise farmer in southern NSW. At the 2016 GRDC research updates John reported on a three stage process to make strategic decisions about Nitrogen (N) nutrition through the season for dryland farmers.
Stage 1 – Prior to sowing
Prepare a Nitrogen […]

N-rich strips show if your crop needs a boost this season

An N-rich test strip in a canola crop at Branson Farms, South Australia.
 
An N-rich test strip in your paddock allows you to follow nitrogen supply in-crop, and see what responses are likely to additional N. The test strip is a part of the paddock where additional N is applied […]

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 […]

Uneven urea spreading costs $$

The majority of fertilizer spreaders deliver substantial variation in their spread pattern. Some areas of the paddock receive too much fertilizer and others too little.
Recent improvements to the Accu-Spread program now allow yield and gross return outcomes from varying nitrogen fertilizer spread patterns to be assessed in wheat and dairy […]