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Catalogue: GRDC Research Summaries
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Catalogue: GRDC Updates (West)
KNIFE POINTS KNIFE POINTS.. Fine repellent dry soil 'boils' up in front of the almost vertical point face and runs behind the point into the seed slot.. The small wings behind the point push up the soil beside the point and increase the slope...
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Catalogue: GRDC Updates (West)
It should be noted that the yield responses measured with paired cuts on water repellent areas were quite large compared to the average grain yield advantage for the winged point-paired row system across the whole paddock (200 kg/ha)... Recent research indicates that some of these formulations only work on quite specific soil types such as the forest loamy gravels or on firmer soils with reasonable clay content and are less effective on the repellent sands... Soil water content contradicted the findings on water repellence and indicated that water infiltration was best under zero-tillage and stubble retention and poorest under stubble removal and cultivation (Figure 1B), and this impacted on crop performance...
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