@book{11290,
	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},
	address = {Rome :},
	url = {ftp://ftp.fao.org/docrep/fao/011/i0131e/i0131e.pdf}
}