A young orchard,old orchard,and cropland converted from orchard were selected on table land,ridge land and slope land at the watershed of Wangdonggou of gully region in the Loess Plateau.Soil moisture content,nitrate and ammonium contents in 0-400 cm(in ridge land and slope land) or 0-600 cm(in tableland) depth were measured.The results showed that soil moisture content significantly decreased in table land,ridge land and slope land,while it began to be resumed in cropland converted from orchard.During the ...
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