multiple cropping system is a special characteristic of agriculture in china, which has crucial function on feeding 22% people of the whole word by 10% cultivate field of the whole world.
中国农业能以占世界10%的耕地养活世界上22%的人口,多熟种植起着决定性的作用。
during 1981-1987, the fixed position observation was conducted in different patterns of multiple cropping system of paddy fields.