养分和矿物质容易从沙质土壤中流失，因此沙质土壤往往较为贫瘠。
Sandy soils are prone to the leaching of nutrients and minerals and so tend to be nutritionally poor.
非点源——像农业或是被开发土壤中流失的分散资源。
Nonpoint source — Diffuse source such as runoff from agricultural or developed land.
降雨强度大，表面径流和壤中流始流时间早，水流量和浓度相应高，累积输出也多。
The water flow volume and phosphorus concentration in both runoffs increased with the rainfall intensity improved;
降雨强度大，表面径流和壤中流始流时间早，水流量和浓度相应高，累积输出也多。
The water flow volume and phosphorus concentration in both runoffs increased with the rainfall intensity improved;
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