Crop Nutrition

In tough conditions crops do better with potassium

Having sufficient potassium reduces crop damage in frost events. Field trials in Western Australia showed benefits from potassium in wheat and canola. Richard Bell is a researcher at Murdoch University. In this video he explains:

Crops respond more to potassium fertiliser in seasons that stress the plants with drought or frost […]

Do I need to worry about the ratio of calcium to magnesium in the soil?

There is a story going around that the ratios of available cations in soils affects crops and pastures.  The idea of a ‘balanced’ soil gained favour in the USA from work in the 1940s. The ‘ideal soil’ had approximately 65% Ca, 10% Mg, and 5% K as exchangeable cations. This […]

Why should you address more than the most limiting subsoil nutrient?

When both phosphorus (P) and potassium (K) are both low in the subsoil there’s a strategic advantage to managing these two nutrients together. Deep phosphorus (P) deficiency is more common than deep potassium (K) deficiency. It’s unusual to see low subsoil K not accompanied by low subsoil P.
Without adequate […]

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 […]

Top advisor info at MPCN roadshow 2016

Peter Lott is an independent cropping advisor who attended the More Profit from Crop Nutrition (MPCN) roadshow at Cootamundra in August 2016. At the end of the day he shared his thoughts on some of the topics covered at the field day, and how he approaches these in his work.

The […]

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 reduce leaf damage when foliar feeding

Foliar feeding applies nutrients to the leaf surface for direct uptake through the leaves. It can be a practical method for correcting in crop nutrient deficiencies that have been diagnosed by plant tissue testing, following periods of waterlogging, or during short periods of dry soil when nutrients are stranded (provided […]

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 […]

Latest expert advice on deep banded fertiliser

Deep banding of phosphorus (P) and potassium (K) fertilisers has shown promising yield responses in some settings, but not in others. Deep-banding trials across Queensland and New South Wales have shown that banding rarely reduces crop yield, but it doesn’t always lead to profitable yield increases.
Some of the variability in […]