1997 Effect of Fall Applied Ethrel on Catkin Removal from Serr and Tehama Walnut Sibbett, G. Steven. 1997.
1980 Tree Training and Management of Close-Planted Orchards: Competition between developing catkins and nuts Ryugo, K., D.E. Ramos. 1980.
1979 Tree Training and Pruning and Management of Close-Planted Orchards: Catkin Development and PFA in "Serr' Orchards Ryugo, K., D.E. Ramos. 1979.
1991 Pruning Serr Walnuts-An Attempt to Reduce Catkin Load and PFA Olson, Bill, Dave Ramos, Ron Snyder. 1991.
1983 Influence of Additional Light Penetration Via Alternate Tree Top Working on Serr Flower Abscission, Reproductive Growth and Yield Olson, Bill, Dave Ramos, K. Ryugo, Ron Snyder. 1983.
1981 Tree Training and Management of Close-Planted Walnut Orchards - Flower Drop Ryugo, Kay, David E. Ramos, Paul LaVine, William Olson, Joe Osgood, Steven Sibbett. 1981.
2009 Comparing ReTain® and HOLD™ for Reducing Pistillate Flower Abortion and Increasing Yield In ‘Serr’ Walnuts Grant, Joe, Janine Hasey 2009.
2006 Evaluation of Retain for Reducing Pistillate Flower Abortion and Increasing Yield in ‘Serr’ Walnuts Anderson, Kathy Kelly, Joe Grant, Janine Hasey, Wilbur Reil 2006.
