@book{36721,
	author = {Sheaffer, Craig C. and Kristine M. Moncada.},
	title = {Introduction to Agronomy : },
	publisher = {Cengage Learning, Inc.},
	year = {(2012).},
	address = {United States.},
	edition = {2nd ed.},
	note = {An introduction to Agronomy.}
}