What are the three main categories into which soil texture can be classified

Soil texture classification refers to the categorization of soil in proportion to the composition of soil particles. It is usually divided into three main categories: sandy, loamy and clayey soils. The three most common soil texture classifications are the International System, the United States Department of Agriculture System, and the Soviet Kachinsky System. These three texture classification system is its particle fraction grade standard and particle size analysis of soil particles dispersion method.

China in the 1930s by Xiong Yi proposed a more complete texture classification, divided into sandy soil, loamy soil, clay loam and clay 4 groups *** 22 kinds of texture. 1978 Chinese Academy of Sciences, Nanjing Institute of Soil Research and Northwest Institute of Soil and Water Conservation, and other units of the formulation of China's soil texture classification of the provisional program, *** 3 groups of 11 kinds of texture. The classification system takes full account of the distribution of China's climatic zones caused by the northern sand south of the sticky situation.