Category: Sowing

Get the best nitrogen benefit from legume rotations

Legumes grown under ideal conditions can add 30 to 120 kilograms of nitrogen per hectare, per year, back into the soil for use by other crops. The benefit of legume rotations to the following crops comes when the nitrogen-rich legume residue has decomposed and released nitrogen into the soil. Wheat […]

How to choose the best way to manage zinc deficiency

Zinc seed dressings can effectively supply zinc to a young crop. The amount of nutrient that can be applied in a seed dressing depends on the size of the seed. Small seeds can carry less of the coating media than large seeds. Seed dressings do not apply sufficient zinc to […]

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 […]

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 […]

Do late sown crops need extra Phosphorus?

As winter sowing dates get later a crop’s potential response to Phosphorus (P) fertiliser rises, at the same time absolute yield potential is falling. This raises the question of what adjustments might need to be made to P fertiliser rates. Plant physiology indicates that later sown crops should be more […]

Give seeds the best chance by avoiding fertiliser damage

Germinating seeds can be damaged by fertiliser placed too close or applied at too high rates. You can check how much fertiliser you can safely drill using the seed damage calculator. The amount of fertiliser that can be safely placed with seed depends on: Crop type Overall canola and lentils […]

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 […]

What’s the minimum Phosphorus rate if you are following a poor crop?

Many growers will be thinking about what to do with Phosphorus (P) fertiliser for their next winter crop. Soil tests are the best indicator of whether a paddock is going to be responsive to P fertiliser. If your soil tests shows moderate to good levels of P, and yields were […]

Using Potassium to put more profit on the bottom line

Potassium nutrition is a key part of crop agronomy. Under the GRDC’s More Profit from Crop Nutrition program, Professor Richard Bell from Murdoch University and collaborators investigated Potassium (K) nutrition in Western Australia; to help growers and advisors better understand crop responses to K inputs in different situations. A free […]

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. […]