Topic: nutrient budget

How to adjust crop nutrition after a good year

High grain yields mean high rates of nutrient removal, in particular, nitrogen (N) and phosphorous (P). Soil fertility in the paddock declines unless nutrients are replaced. Soil and grain tests help you make better nutrient budget decisions.
Reference values for nutrient removal are just an indication (especially for P):

A 6-tonne […]

What happens to nutrients when stubbles burn?

Most of the nitrogen (N) and carbon (C) contained in crop stubbles is lost when they are burnt. Around 100 kg/ha of urea could be needed to replace the N lost from burning stubble from a high yielding wheat paddock. Substantial amounts of stubble sulfur (S), phosphorous (P) and potassium […]

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 […]

Nailing nitrogen applications

For Wimmera and Mallee farming businesses, fertiliser is the biggest variable expense.  Creating Nitrogen (N) budgets based on predicted yields makes sense.
N budgets start with realistic target yields based on predicted rainfall for the growing season. For wheat it is calculated as yield (kg/ha) = (growing season rainfall (mm) – […]