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water entry

Catalogue: GRDC Final Reports
The expression of water repellency under different tillage and stubble managements was evaluated to investigate anecdotal evidence that repellency disappears under zero-tillage and stubble retention... The results highlight the importance of evaluating water infiltration in the field to take into account not just the physical repellency of the soil, but to include all possible mechanisms of water entry... The results highlight the importance of evaluating water infiltration in the field and not just relying on laboratory measures of water repellency...
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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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soil (2)