@book{14927,
	author = {Motsara, M. R. and Roy, R. N. and Food and Agriculture Organization of the United Nations.},
	title = {Guide to laboratory establishment for plant nutrient analysis /},
	publisher = {Food and Agriculture Organization of the United Nations,},
	year = {2008.},
	series = {FAO fertilizer and plant nutrition bulletin,},
	address = {Rome :}
}