一种新型的耕作制度据国际热带农业研究中心Ｉ．ｓａｎｚ报道，一种适用于南美热带草原地区种植水稻和改良牧场的新型耕作制度在不到２年时间已推广了６０００ｈａ以上。在南美大陆，大约有１．２３亿ｈａ（占大陆面积６％）的酸性贫瘠草原上农作物生长不良。这种适用于此... A New Tillage System According to the International Center for Tropical Agriculture I. sanz reported that a new tillage system that is suitable for growing rice and improving pastures in the savannah region of South America has been rolled out more than 6000 ha in less than two years. In the South American continent, about 123 million ha (6% of the continent area) of acid poor barren grassland crop growth poor. This applies to this ...