soil abundance

The abundance and availability of water and nutrients in a soil ecosystem determine its fertility.

土壤生态系统中水分和养分的丰度和有效性决定土壤的肥力.

The soil moisture content of bottom layer was higher than and central layer, stabile and abundance.

底土层含水量较耕作层和心土层高, 且较稳定,含水量较为丰足.

They indicate the titanium and iron abundance, as well as the maturity of a lunar soil.

他们能显示出月球钛和铁储量的丰富储量和其土壤的成熟度。

Wind-borne soil deposits give this area it's abundance of foliage.

风成土壤沉积使得这个地区植被茂盛.

The results showed that relationship between the weed and the soil moisture in cultivated horizon was obvious. The monocots whose relative abundance increased with the soil moisture are the most abundant in the seriously waterlogged area.

结果表明，该地区油菜田杂草的发生特点与耕作层土壤水分含量存在明显关系：对产量危害较大的禾本科杂草在重渍害区为优势种群，其相对多度随着土壤水分的增加而增高；