土壤养分流失是农田非点源污染的主要形式。
Soil nutrients loss is the main way of non point pollution from farmland.
土壤剖面中a层的流失是土壤养分流失的标志。
A layer loss in soil profile is a sign of soil nutrient loss.
坡度是影响坡面水土流失和土壤养分流失过程的重要因素。
Slope gradient has many impacts on soil erosion by water and mineral nitrogen loss in an erosion process.
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