@book{227000,
	author = {Laj R. Ahuja and Liwang Ma},
	title = {Methods of introducing system models into agricultural research / Laj R. Ahuja and Liwang Ma},
	publisher = {American Society of Agronomy; Crop Science Society of America; Soil Science Society of America},
	year = {2011},
	address = {Madison},
	note = {Advances in Agricultural Systems Modeling 2.}
}