sand grain content meaning in English

砂粒含量

2 . the structure of purple soil is meliorated by sabaigrass . when contrast to bare land treatment and natural wild grassland treatment we knew that sabaigrass treatment and grass tree solid plating treatment reduced soil bulk density , enhanced soil capillary porosity , non - capillary porosity and porosity ratio , decreased soil sand grain content , enhanced soil clay grain and silt grain content so as to reduced the dispersal degree of soil , improved the aggregate capacity of soil , increased the amount of soil aggregate structure , meliorated the water permeability of soil , accelerated the form of good soil structure
龙须草能改善紫色土的土壤结构龙须草纯种植被和林草立体种植植被能不同程度地降低土壤容重，减少土壤砂粒含量，增加土壤的毛管孔隙度、非毛管孔隙度和孔隙比，以及增加粉粒含量，从而降低土壤分散度，提高土壤团聚性，增加土壤团粒结构数量，改善土壤的透水性，促进良好土壤结构的形成，最终提高土壤的蓄水保肥性能，增强土壤的抗蚀性和抗冲性。