by Hamrita, T.K., Tollner, E.W., Schafer, R.L.
Published in IEEE transactions on industry applications (01.07.2000)

by Kirk, W.W, Wharton, P.S, Schafer, R.L, Tumbalam, P, Poindexter, S, Guza, C, Fogg, R, Schlatter, T, Stewart, J, Hubbell, L
Published in Plant disease (01.07.2008)

by Schafer, R.L., Johnson, C.E.
Published in Soil & tillage research (1990)

by Robbins D.H, Schafer R.L, Johnson C.E
Published in American Society of Agricultural Engineers (Microfiche collection) (USA). no. fiche no. 88-1628 (1988)

by Johnson, C.E, Schafer, R.L, Young, S.C
Year of Publication 1984

by Evans D.E, Johnson C.E, Schafer R.L
Published in Paper - American Society of Agricultural Engineers [Microfiche collection] (USA). no. fiche no. 84-1045 (1984)

by Young S.C, Johnson C.E, Schafer R.L
Published in Paper - American Society of Agricultural Engineers (Microfiche collection) (USA). no. fiche no. 81-1604 (1981)

by Bailey, A.C, Johnson, C.E, Schafer, R.L, Nichols, T.A, Grisso, R.D
Year of Publication 1985

by Schafer, R.L, Johnson, C.E
Published in ASA Special Publication American Society of Agronomy (1982)

by Schafer, R.L. (Soil Dynamics Laboratory, USDA, ARS, Auburn, AL), Johnson, C.E, Koolen, A.J, Gupta, S.C, Horn, R
Published in Transactions of the ASAE (01.11.1992)

by Bailey, A.C., Johnson, C.E., Schafer, R.L.
Published in Journal of agricultural engineering research (1986)

by Schafer, R.L. (USDA, ARS, Auburn, AL), Bailey, A.C, Johnson, C.E, Raper, R.L
Published in Transactions of the ASAE (01.07.1991)

by Chapman, M.L., Johnson, C.E., Schafer, R.L., Gill, W.R.
Published in Journal of agricultural engineering research (1988)

by Schafer, R.L, Gill, W.R, Reaves, C.A
Published in Transactions of the ASAE (1979)

by Schafer, R.L., Johnson, C.E., Elkins, C.B., Hendrick, J.G.
Published in Journal of agricultural engineering research (01.01.1985)

by Evans, D.E., Johnson, C.E., Schafer, R.L.
Published in Journal of terramechanics (1985)

by Hamrita, T.K., Tollner, E.W., Schafer, R.L.
Published in IAS '96. Conference Record of the 1996 IEEE Industry Applications Conference Thirty-First IAS Annual Meeting (1996)

by Schafer, R.L.
Published in Soil & tillage research (01.01.1984)

by Smith B.E, Schafer R.L, Johnson C.E
Published in American Society of Agricultural Engineers. Meeting (USA). no. 94-1039/94-1074 (1994)

by Young, R.E, Schafer, R.L
Published in Agric Eng St Joseph, Mich (1977)