- Oregon State University. Extension Service120
- Oregon State University. Agricultural Experiment Station80
- Hart, John M. (John Mervyn), 1947 51
- Forest Products Laboratory (U.S.)44
- Gardner, Ernest Hugh29
- Jackson, T. L. (Thomas Lloyd), 1922 20
- Oregon State University16
- United States. Agricultural Research Service16
- Horneck, Donald Arthur15
- Christensen, Neil Walter, 1944 14
- Et Al.13
- Oregon State University. Department Of Crop Science12
- Oregon State University. Malheur Experiment Station12
- Klingeman, Peter C.11
- Oregon State University. Water Resources Research Institute11
- Idaho Water Resources Research Institute10
- Montana University Joint Water Resources Research Center10
- State Of Washington Water Research Center10
- Mansour, N. S.9
- Mellbye, Mark Edward9