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土壤陆地上能生长植物(包括作物)的疏松表层。它具有肥力。土壤的组成物质复杂,固体、液体、气体都有,它们之间互相联系,互相制约;组成物质不同,土壤的性质也不同。土壤组成和土壤性质影响着土壤肥力状况。土壤肥力对农作物的生长起着决定性的作用。土壤时刻在运动变化着,有其自身发生、发展的过程,受着自然因素和人为因素的影响。各地自然条件和人类生产活动的差异,形成各种不同类型的土壤某些因素改变,随着时间的推移,土壤类型也随着改变。自然土壤是在气候、生物、地形和
Soil surface can grow plants (including crops) loose surface. It is fertile. Soil composition of matter is complex, solid, liquid, gas, they are linked to each other, mutual constraints; composition of different materials, the nature of the soil is also different. Soil composition and soil properties affect soil fertility. Soil fertility plays a decisive role in crop growth. Soil movement in the moment, with its own occurrence and development process, subject to natural and human factors. Differences in natural conditions and human activities around the country have led to some changes in various types of soils, and the types of soils have changed over time. Natural soils are in climate, biology, topography and