by Singleton W.L, Petritz D.C
Published in Part of a subject series (USA) (1981)

by Petritz D.C, Doster D.H, Dobbins C.L, Johnson K
Published in Publication I.D. - Cooperative Extension Service (1987)

by Beale T, Hasbargen P.R, Ikerd J.E, Murfield D.E, Petritz D.C
Published in Miscellaneous Publication - U.S. Dept of Agriculture (USA). no. 1430 (1983)

by Petritz, D.C
Year of Publication 1985

by Petritz, D.C
Published in Purdue Farm Management Report - Purdue University, Agricultural Economics Dept., Coop. Ext. Serv (USA) (01.02.1982)

by Petritz, D.C, Johnson, D.P
Year of Publication 1986

by Arbuckle F.R, Petritz D.C
Published in Hoard's Dairyman (1978)

by Singleton, W.L, Petritz, D.C
Published in Part of a subject series (USA) (1981)

by Arbuckle, F.R, Petritz, D.C
Published in Better crops with plant food (1978)

by Beetley, P.A, Dunn, J.P, Petritz, D.C
Published in Computers in agricultural extension programs : proceedings of the 4th international conference, 28-31 January 1992, Orlando, Florida / sponspored by the Florida Cooperative Extension Service, University of Florida (1992)

by Beetley, P.A. (Computer Communication Enterprises), Petritz, D.C
Year of Publication 1990

by Parsons S.D, Petritz D.C, Lechtenberg V.L
Year of Publication 1976

by Martin, N.R, Petritz, D.C, Van Arsdall, R.N
Published in Aerr Agr Econ Res Rep Ill Univ Dep Agr Econ Agr Exp Sta (1969)

by Beetley, P.A. (Purdue University), Hammer, P.A, Johnson, K.D, Petritz, D.C
Year of Publication 1988

by Petritz, D.C, Dobbins, C.L, Pershing, D.J, Beetley, P.A
Year of Publication 1988

by Petritz D.C, Lechtenberg V.L, Smith W.H
Published in Agronomy journal (01.01.1980)

by Lechtenberg V.L, Hendrix K.S, Petritz D.C, Parsons S.D
Published in Forage and Grassland Progress (1980)

by Johnson, K.D. (Purdue University, West Lafayette, IN), Santini, J.B, Petritz, D.C
Published in Proceedings of the Forage and Grassland Conference (USA) (1990)

by Lechtenberg, V.L, Smith, W.H, Parsons, S.D, Petritz, D.C
Published in Crops and soils (1976)

by Nelson, L.A, Hendrix, K.S, Lemenager, R.P, Petritz, D.C
Published in Journal of animal science (01.09.1980)