@book{4114,
	author = {Sabbe, Wayne E. and Mahler, Richard J.},
	title = {Soybean response to phosphorus and potassium fertilizer in Arkansas},
	publisher = {Arkansas Agricultural Experiment Station,},
	year = {1991},
	series = {Bulletin},
	address = {Fayetteville :},
	note = {D52-197}
}