1982 Management Systems for High Density Walnut Orchards Ramos, D., Kay Ryugo, William Olson, Joe Osgood, William Krueger, Ronald Snyder. 1982.
1991 Evaluation of Walnut Under High Density Planting and Management Systems Ramos, D., W. Olson, J. Osgood, W. Krueger, G.S. Sibbett, W. Reil, K. Kelley, R. Snyder, K. Ryugo. 1991.
1991 Determination if a Rootstock More Tolerant of Nematodes, A Winter Cover Crop, or a Standard Chemical Treatment Will Improve Tree Growth and Protection in English Walnuts and Control Root Lesion Nematode (Pratylenchus Vulnus) Olson, Bill, Becky Westerdahl, Delbert Siemson, Mike Howard, Bill Stuke. 1991.
1991 New Approaches to Control Walnut Blight Schroth, Milton, Bill Olson, Art McCain, Joe Osgood, Mavis Date-Chong Hendson, Yung-An Lee, Beth Teviotdale. 1991.
1990 New Approaches to Control Walnut Blight Schroth, Milton, Joe Osgood, Bill Olson, Art McCain, Mavis Chong Hendson, Yung-Ann Lee. 1990.
1990 Evaluation of Walnut Under High Density Planting and Management Systems Ramos, D., W. Olson, J. Osgood, W. Krueger, G. S. Sibbett, W. Reil, L. Hendricks, K. Kelly, R. Snyder, K. Ryugo. 1990.
