by Overdahl C.J, Schoper R.P
Year of Publication 1978

by Grava J, Fenster W.E, Schoper R.P
Published in Miscellaneous Report - Minnesota Agricultural Experiment Station (USA). no. 163 (1979)

by Schoper R.P, Overdahl C.J, Simkins C.A
Published in Extension Bulletin - Agricultural Extension Service (1978)

by Fenster W.E, Overdahl C.J, Simkins C.A, Grava J, Schoper R.P
Published in Agricultural Extension Service (1978)

by Fenster W.E, Overdahl C.J, Randall G.W, Schoper R.P
Published in Miscellaneous Report - Minnesota Agricultural Experiment Station (USA). no. 153 (1978)

by Schoper, R.P, Malzer, G.L, Simkins, C.A
Published in Agronomy journal (01.01.1979)

by Caldwell, A.C, Schoper, R.P
Published in Soil Series - Minnesota University, Agricultural Extension Service (USA) (01.03.1977)

by Malzer, G.L, Schoper, R.P
Published in Soil Series - Minnesota University, Agricultural Extension Service (USA) (01.03.1977)

by Simkins, C.A, Schoper, R.P
Published in Soil Ser Dep Soil Sci Univ Minn (1974)

by Schoper, R.P, Fenster, W.E, Gunderson, O.M
Published in Soil Series - Minnesota University, Agricultural Extension Service (USA) (01.03.1978)

by Malzer, G.L, Schoper, R.P, Lensing, J
Published in Soil Ser Minn Univ Agric Ext Serv (1977)

by Malzer, G.L, Schoper, R.P, Lensing, J
Published in Soil Ser Minn Univ Agric Ext Serv (1976)

by Schoper, R.P, Malzer, G, Simkins, C
Published in Soil Ser Minn Univ Agric Ext Serv (1976)

by Schoper, R.P, Simkins, C, Lensing, J
Published in Soil Ser Dep Soil Sci Univ Minn (1975)

by Grava, J, Schoper, R.P, Fairchild, D.S
Published in Soil Ser Dep Soil Sci Univ Minn (1975)

by Simkins C.A, Schoper R.P, Randall G.W, Evans S.D, Bissonnette H.L
Published in Soil Series Minnesota University, Agricultural Extension Service (1978)

by Caldwell A.C, Lensing J.N, Schoper R.P, Wiens M
Published in Soil Series Minnesota University, Agricultural Extension Service (1978)

by Simkins C.A, Schoper R.P, Randall G.W, Evans S.D, Bissonnette H.L
Published in Agricultural Extension Service, University of Minnesota, Special Report (1978)

by Grava J, Randall G.W, Overdahl C.J, Schoper R.P, Lensing J.N
Published in Soil Series Minnesota University, Agricultural Extension Service (1978)

by Malzer, G.L, Schoper, R.P, Simkins, C.A, Heiner, R, Evans, S
Published in Soil Series - Minnesota University, Agricultural Extension Service (USA) (01.03.1978)