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soil fertility

Catalogue: GRDC Updates (South)
It can be expected that adoption of no-tillage or stubble retention is likely to remain low for continuous cereal production in areas where no long-term yield benefit can be demonstrated... Crops achieve their maximum potential yield at maturity any delay between maturity and harvest results in yield and quality losses... Finally growers could consider using different cultivars and sowing times to avoid having the entire crop ready for harvest at exactly the same time...
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Catalogue: GRDC Updates (North)
Grains Research Update for Growers Coolah August 9, 2000 include screening grain for presence of toxins like pyrrolizidine alkaloids (heliotrope) and corynetoxins (ryegrass)... It can be expected that adoption of no-tillage or stubble retention is likely to remain low for continuous cereal production in areas where no long-term yield benefit can be demonstrated... Grains Research Update for Growers Coolah August 9, 2000 management Desiccation Harvest - Pea weevil - see Managing Pea Weevil - Heliothis - see Insect and Mite Control in Field Crops 1999 For harvest planning, seed quality, weed control, better harvesting...
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Catalogue: GRDC Updates (South)
Grains Research Update for Growers Coolah August 9, 2000 include screening grain for presence of toxins like pyrrolizidine alkaloids (heliotrope) and corynetoxins (ryegrass)... It can be expected that adoption of no-tillage or stubble retention is likely to remain low for continuous cereal production in areas where no long-term yield benefit can be demonstrated... Grains Research Update for Growers Coolah August 9, 2000 management Desiccation Harvest - Pea weevil - see Managing Pea Weevil - Heliothis - see Insect and Mite Control in Field Crops 1999 For harvest planning, seed quality, weed control, better harvesting...
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Catalogue: GRDC Updates
Timely application of N can improve yield and protein of a wheat crop (Hill 2005)... The use of precision sowing to plant into the ridge of the previous season will influence crop behaviour... It is suspected that the application of results from this trial may be limited to the deep sandy earth sand plain soils in the medium rainfall zone...
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Catalogue: GRDC Updates
Declining soil organic matter is resulting in declining organic reserves of nitrogen (N) and sulfur (S), while nutrient removal has also depleted the soil minerals providing slow release reserves of phosphorus (P) as well as K. In most situations we have a reasonable ability to assess and meet N demand, but P inputs continue to be at rates << the rate of removal in grain while K and S inputs are non-existent... At both sites, yields were ~800kg/ha higher when K (Warra) or S (Brookstead) was added in addition to extra P. These responses were quite substantial (16% - 26% increases over adding P alone), and compared to the commercial practice at Brookstead, addressing the combined P and K limitations raised yield potentials by ~50%... The sites will be monitored over coming seasons, and are part of a network of trials across northern NSW and southern and central Qld assessing the responses to addressing multiple nutrient limitations, in addition to examining the most appropriate application strategies for the different nutrients...
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