同一剖面从表层向下骨骼颗粒增多,细粒物质减少。
From the surface to the bottom horizon skeleton increases and plasma decreases.
当试验中细粒物质含量占到总量的28%时,起动所需水量最小。
When the content of the fine material in the slag reaches 28%, the slag is the most vulnerable to start.
沙生植被的增加会显著增加土壤中细粒物质的含量,但多年生草本对风蚀的减缓作用低于灌木;
More vegetation covers make the soil particle finer in sand land, but the perennial herbage decrease the wind erosion less than shrub.
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