Nutrient deficiencies guides
Spotting nitrogen, phosphorus, potassium, sulphur, zinc, copper and manganese deficiency in crops, and the products that supply them.
Nutrient deficiencies guides
Nutrient deficiencies
Copper deficiency in wheat and barley: symptoms and fixes
How to spot copper deficiency in wheat and barley, why it causes white heads and empty grain, how to confirm it, and soil vs foliar copper options.
Updated 25 October 2026
Nutrient deficiencies
Nitrogen deficiency in wheat: symptoms, look-alikes and fixes
How to spot nitrogen deficiency in a wheat crop, what else looks like it, how to confirm it with a plant tissue test, and in-season options.
Updated 25 October 2026
Nutrient deficiencies
Phosphorus deficiency in wheat and barley: signs and fixes
How to recognise phosphorus deficiency in wheat and barley, what it is confused with, how to confirm it, and why the fix is mostly at sowing.
Updated 25 October 2026
Nutrient deficiencies
Manganese deficiency in wheat and barley: symptoms and fixes
Manganese deficiency in wheat and barley: pale floppy patches, white flecks, alkaline and gravel soils, liming risk, tissue tests and foliar options.
Updated 24 October 2026
Nutrient deficiencies
Potassium deficiency in wheat: symptoms, soils and fixes
Potassium deficiency in wheat: dead leaf tips on older leaves, sandy and duplex soils, DPIRD tissue and Colwell K levels, and MOP vs SOP top-dressing.
Updated 24 October 2026
Nutrient deficiencies
Sulphur deficiency symptoms in canola: what to look for and what to apply
How to spot sulphur deficiency in canola, why it needs far more S than wheat, which paddocks are at risk, and sulphate vs elemental sulphur, with sources.
Updated 24 October 2026
Nutrient deficiencies
Zinc deficiency in wheat: symptoms, risky soils and fixes
How to spot zinc deficiency in wheat, which soils are most at risk, and how soil, seed and foliar zinc compare, with sourced rates and tissue test levels.
Updated 24 October 2026