by Higgins, S.F., Coyne, M.S., Shearer, S.A., Crutchfield, J.D.
Published in Bioresource technology (01.06.2005)

by Liu D, Clark J.D, Crutchfield J.D, Sims J.L
Published in Communications in soil science and plant analysis (01.01.1996)

by Thomas, G.W. (Univ. of Kentucky, Lexington, KY), Haszler, G.R, Crutchfield, J.D
Published in Journal of environmental quality (01.01.1992)

by Thomas, G.W. (University of Kentucky), Haszler, G.R, Crutchfield, J.D
Published in Soil science news and views - Cooperative Extension Service and University of Kentucky, College of Agriculture, Department of Agronomy (USA) (1990)

by Thomas, G.W, Crutchfield, J.D
Published in Journal of environmental quality (01.01.1974)