Fertilizer Recommendations for Field Crops in Michigan. Christenson, D., Warncke, D., Vitosh, M., Jacobs, L., & Dahl, J. Michigan State University Extension Bulletin E-550A, East Lansing, MI, 1992.
bibtex   
@book{christenson_fertilizer_1992,
	address = {East Lansing, MI},
	title = {Fertilizer {Recommendations} for {Field} {Crops} in {Michigan}},
	publisher = {Michigan State University Extension Bulletin E-550A},
	author = {Christenson, D.R. and Warncke, D.D. and Vitosh, M.L. and Jacobs, L.W. and Dahl, J.G.},
	year = {1992},
	keywords = {KBS}
}

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