This website is no longer being updated.

GRDC Communities Logo

Generic selectors
Exact matches only
Search in title
Search in content
Search in posts
Search in pages

Tag archive: nitrogen

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 […]

Timing is more important than form with nitrogen

Getting the timing right for topdressed N fertiliser to best match crop demand is more important for N use efficiency than choosing the right N fertiliser form. Field experiments generally show that granular urea, urea solutions and UAN perform equally well in supplying N when used in-crop. The most common […]

How to include ammonium-N in recommendations

It used to be that nitrate was often the only form of nitrogen (N) specified in soil test results. Now it’s common for soil test results to specify the quantity of ammonium-N as well. Recently some unusually high ammonium levels – equal to or higher than nitrate levels – have […]

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 […]

Crop nutrition research put in the spotlight

The More Profit From Crop Nutrition II (MPCN II) initiative features in the July/August 2016 Ground Cover Supplement. MPCN II brings together more than 20 Grains Research and Development Corporation (GRDC) funded crop nutrition projects from across Australia with the aim of improving fertiliser input returns and nutrient use efficiency […]

Dig deeper if you really want to know about Nitrogen

Rain encourages soil microbes to mineralise soil organic nitrogen (N) into plant available mineral forms. Some mineral N can leach, moving down in the soil profile with subsequent rain. Deep N soil testing can better estimate the amount of N available in the soil for the crop to make use […]

Think twice before sowing chickpeas into high Nitrogen soils

leaf tips are dead

The current temptingly high chickpea prices make them an attractive option. In paddocks with high soil nitrate (>100kg N/ha) chickpeas may not yield as well as expected, or deliver the usual legume break crop advantage of a net benefit to the paddock’s nitrogen (N) balance. Paddocks can have high starting […]

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 […]

Test first, then time Nitrogen fertiliser to reduce losses

Optimal timing of Nitrogen fertiliser applications can maximise crop uptake and reduce losses to the atmosphere. Soil Nitrogen (N) dynamics in Victoria show some big differences between regions. High rates of N losses recorded from soils in the High Rainfall Zone (HRZ) emphasise how important timing of N applications can […]

Watch our webinar: how to review last season’s crop nutrition decisions

You might know how much you or your client spent on crop nutrition last season, but do you know if it was well spent? Review at the end of the season is the best place to answer that question. How do you assess how well last season’s crop nutrition management […]

Tips to tweak your crop nutrition program following drought

Following drought growers look to recover production and protect vulnerable soils. When it comes, the break may present opportunities to cut back on some usual nutrient inputs while moving back into production. Soils should be managed with an eye to their long term fertility. Phosphorus Soil phosphate levels may increase […]