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| topsoil (Topsoil is the upper, outermost layer of soil, usually the top 2 inches (5.1 cm) to 8 inches (20 cm). It has the highest concentration of organic matter and microorganisms and is where most of the Earth's biological soil activity occurs. WK Alexander Demidov) | |||
| rich soil layer; fertile soil layer (ПСП Bema) | |||
| top soil (G.O.A.N.) | |||
| плодородный слой почвы: 7 短语, 5 学科 |
| 一般 | 2 |
| 库页岛 | 1 |
| 气体加工厂 | 2 |
| 能源行业 | 1 |
| 马卡罗夫 | 1 |