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Tag archive: phosphorous

A shift in soil pH can improve Phosphorus response

 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 […]

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 […]

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 […]

Root systems that respond to banded fertilisers

Crop varieties that can exploit fertiliser placed in bands could be crucial to future cropping yields and fertiliser use efficiency. Many of our cropping systems are slowly running down the native soil fertility. Ongoing cropping in these soils could depend more and more on nutrients placed into the soil as […]

Deep Phosphorus fertiliser trials in NSW

Deep phosphorus (P) placement to improve crop productivity is being investigated in the central west of NSW, at Gilgandra and Nyngan. Led by Dr. Mike Bell (QAAFI), the trial investigates how deep P placement affects the fertility of the subsoil, and the economic effectiveness of deep P placement. The work […]

What nutrients are lost when making hay from failed crops?

Cutting for hay is an option to get some economic value from a failed crop. Growers with an eye to the long term productivity of their paddocks weigh the value of the hay against the value of leaving the crop material in the paddock. Nutrients that would otherwise be recycled […]

What happens to P from crop residues?

Annie McNeill from the University of Adelaide talks about the challenges in understanding what happens to the phosphorous returned to the soil in crop and break crop residues. Recorded at the National Soil Science Conference at the Melbourne Cricket Ground, November 2014. Further information National Soils Conference proceedings: Available P in topsoil […]

Crop nutrition in soils with added clay

David Hall from DAFWA says adding clays to sandy soils can add significant Potassium and Phosphorous, as well as improve the nutrient holding capacity of the soil.  Recorded at the National Soil Science conference at the Melbourne Cricket Ground, November 2014. Further information Proceedings of the Soil Science Australia National Soil […]