Farm Products

Managing fertiliser application rates through testing

SUBSOIL testing for phosphorus (P) levels may help save farmers money in fertiliser costs. According to the Grains Research and Development Corporation, testing subsoil (10-30cm) P levels using the Colwell-P and BSES-P tests across the farm is the key to making an informed decision about fertiliser application rates. If those tests show that soil P status is sufficient, there may be an opportunity for growers to save money on P fertiliser by cutting back to a maintenance rate.

The GRDC Crop Nutrition Fact Sheet can be downloaded at, just search for "PhosphorusManagement".

Topics:  farm products fertiliser costs soil health

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