英语翻译

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英语翻译
4.3.Grazing
Our results suggest that generalizations about the effect of grazing on soil properties at the whole plot level are not justified since no such effects were detected.The effects of grazing need to be examined at the finer spatial scale of the individual cover type.At this scale,grazing did increase bulk density and reduce moisture and organic carbon contents,as hypothesized,but almost invariably only at the trampling routes.On the whole,grazing had the highest impact on the most exposed type of cover,i.e.,the trampling routes,and almost no significant effects on the properties of the soil under the most mulched cover – the shrub patch.In the shrub patches,presence or absence of the grazing animal had no effect on the bulk density of the soil,which is consistent with our impression from the field that sheep and goats donot trample the area covered by the dense and thorny canopy of S.spinosum.

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