Subsoil phosphorus (P) deficiency costs growers in Queensland and Northern NSW around $80–100 million each year in reduced yield. Deep P fertiliser applications into the subsoil can improve yield but are a long-term decision. They are moderately expensive and returns are not immediate. The Deep-P calculator helps Northern region growers […]
Australian crop advisors can use the best available science to give fertiliser advice. The Better Fertiliser Decisions for Cropping (BFDC) database:
is the best available data resource
is continually upgraded with the latest field trial results
holds data from over 5,600 research trials looking at fertiliser response
underpins the recommendations of Fertcare […]
Micronutrients or trace elements are often suspected to be deficient in some Australian cropping regions. Some trace element applications are now routine. But recent trials in areas with reported deficiencies have shown little response to micronutrient applications.
In southeastern Australia, 23 trials were run on wheat, barley and canola […]
Paddock nutrient test strips showed two nutrient deficiencies in Justin Wundke’s barley crop. Justin and family run a cropping and prime sheep enterprise in South Australia.
Before sowing last year’s crop Justin knew his paddock could have an issue with sulfur deficiency. Justin set up some test strips in his paddock after […]
eXtensionAUS Crop Nutrition published 49 articles in 2016. These were the most popular:
Can I burn lime and gypsum with stubble?
Bottom line: Loss of limestone will be minimal, gypsum might lose some solubility.
2. Three reasons why topdressing nitrogen can fail
Not enough rain after topdressing, too wet, too late!
3. The best frost tactics for […]
Soil compaction caught the eye of growers and advisors at recent field days. Soil pits were part of every More Profit from Crop Nutrition roadshow field day. Soil scientists explained what they could see in the soil profiles.
Crop nutrition relies on roots exploring the soil to access nutrients. Ideally, soil […]
Soil pH and phosphorus (P) fertiliser can interact to make soil phosphorus more available. This can happen when:
there are no other major nutrient deficiencies.
recent lime application has produced a large change in soil pH (>0.5 pH units).
The soil pH and P interaction is driven by changes to root growth in […]
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 […]
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 […]
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 […]