very fine sand meaning in Chinese

极细砂
甚细砂

Vegetation restoration also resulted in the changes of soil physical and chemical properties , i . e . , the contents of organic matter , alkali - hydro nitrogen , rapidly - available potassium and the contents of fine sand , very fine sand and clay were increased significantly , while ph and the content of rapidly - available phosphorus were decreased
植被的恢复使土壤理化性质发生了变化，与恢复前相比土壤中有机质、碱解氮、速效钾以及细砂、极细砂、粉砂、粘粒含量显著增加， ph值和速效磷含量降低。
Grain - size accumulation percentage of the aeolian sands in the past 150 ka in milanggouwan section is mainly characterized by the aeolian palaeo - mobile dune sands , which are composed of majority fine sands and minority very fine sands . there is n ' t almost any silt and clay . those of the fluvial facies , especially the lacustrine facies and palaeosols , are mainly composed of very fine sands and also contain some quantities of silt and clay
米浪沟湾剖面150kabp以来风成砂的粒度累积百分含量以古流动砂丘砂物质为主，其中以细砂含量最高，极细砂为次，几乎不含粉砂与粘土；河流相、特别是湖沼相与古土壤以极细砂含量占优势，且具一定含量的粉砂和粘土。