@book{2407,
	author = {Samarn Panichapong and The Soil and Fertilizer Society of Thailand (SFST)},
	title = {Soil management for sustainable rice production in the Tropics :},
	publisher = {IBSRAM,},
	year = {1991},
	address = {Chiang Mai :},
	note = {This is the 1991 version of the selected papers from the first international symposium on paddy soil fertility in 1988. The papers are divided in 5 sections; rice and soil, sustaining chemical soil fertility, soil fertility and biological inputs, fertilizer and paddy soil fertility, and management of physical soil properties.}
}