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Catalogue: GRDC Updates
Long fallow increases soil water at sowing which in turn increases yield on good water holding capacity soils, particularly when the growing season rainfall is low (<210mm) and the summer rainfall was low (<100mm).. On good water holding capacity soils, 22-29% of years following long fallow had an average yield increase of 0.46-0.59 t/ha at Dalwallinu, 39-47% of years had an average yield increase of 0.49-0.82 t/ha in Perenjori while at Merredin 37-60% of years had a 0.51-0.76 t/ha yield increase... From other modelling work the increase stored mineral N from a fallow is 40-70 kg N/ha (Farre et al, 2012)...
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Catalogue: GRDC Final Reports
Left uncontrolled, weed flushes impact on soil water storage... The effects of different summer fallow management practices on soil water storage were studied using a replicated field trial with five treatments: (1) stubble harvested for straw with strict weed control, (2) stubble left standing after harvest with or (3) without weed control, and (4) stubble flattened (as with Coolamon harrow) with or (5) without weed control... We used a simulation study to generate a range of different starting subsoil water contents by changing the simulated weed management during the summer fallow...
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Catalogue: GRDC Updates (West)
Long fallow increases soil water at sowing which in turn increases yield on good water holding capacity soils, particularly when the growing season rainfall is low (<210mm) and the summer rainfall was low (<100mm).. On good water holding capacity soils, 22-29% of years following long fallow had an average yield increase of 0.46-0.59 t/ha at Dalwallinu, 39-47% of years had an average yield increase of 0.49-0.82 t/ha in Perenjori while at Merredin 37-60% of years had a 0.51-0.76 t/ha yield increase... From other modelling work the increase stored mineral N from a fallow is 40-70 kg N/ha (Farre et al, 2012)...
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