1969—1974年,在静网县“牧之原”(Makinohara)台地洪积土壤,进行种茶前土壤改良,和种茶后灌溉,以及施用堆肥,对改植茶园,促进茶树生长效果的调查研究。灌溉和施用堆肥,可促进幼树的生长,但是,种茶后5—6年检查其深耕改良土壤,是没多大效果的。据推测一般“牧之原”台地,距土面约 From 1969 to 1974, alluvial soils were planted in the Makinohara platform of Jingwang County for soil improvement before planting tea, irrigation after planting tea, and compost applied to investigate the effects of planting tea plantations and promoting the growth of tea trees. Irrigation and the application of compost can promote the growth of saplings, however, it is of little consequence to examine their plowed soil improvement 5-6 years after planting tea. It is speculated that the general “Makinohara” platform, from the soil about