Stubble management influences nitrogen tie-up mineralisation

TRIALS conducted in southern New South Wales as part of GRDC’s Maintaining profitable farming systems with retained stubble initiative with CSIRO and FarmLink Research have shown that grazing wheat stubbles can increase the yield of subsequent wheat crops due to less immobilisation and greater availability of mineral nitrogen to following crops.

Stubble management influences nitrogen tie-up mineralisation Stubble management influences nitrogen tie-up mineralisation Stubble management influences nitrogen tie-up mineralisation Stubble management influences nitrogen tie-up mineralisation Stubble management influences nitrogen tie-up mineralisation

John Kirkegaard. Image: Nicole Baxter

One of the key messages to come out of the research is that growers wishing to retain all stubble should avoid growing wheat after wheat, but if doing so should reduce residue loads by grazing or late