In this case wind will penetrate to the soil surface and wind erosion is possible. Stubble from canola crops seems particularly resistant to wind erosion, and is ideal for grazing when other paddocks are reaching critical levels. Erosion under summer gazing Wind erosion during summer and late autumn, before the opening rains, depends on detachment of soil and removal of ground cover by grazing sheep. Soil A sheep can detach from one third of a tonne of soil per week on a hard - setting soil to over one tonne per week on the sandplain soils, which will blow away if there is insufficient cover. Pasture species Many weeds and all legumes are easily broken by sheep tramping and are blown away in moderate winds.
Grasses can withstand trampling better and so are able to protect the soil in higher velocity winds.
The ideal is an evenly - mixed sward of clover and grasses. While grasses in pasture encourage some soil insects and diseases, controlling these problems rather than creating grass - free pastures may be necessary to avoid wind erosion. Use this as a guide to calculate the potential grazing for the summer period. Grazing pea or faba bean stubbles may be followed by severe wind erosion, as stubbles break up and blow away, leaving the soil completely bare. The aim of wind erosion control is to implement farming management that will avoid erosion and not, as in the past, repair erosion after the events.