Training or shaping trees for easier harvesting must take into account yield reduction from pruning operations. Reshaping mature Valencia trees by slab pruning resulted in 80% less fruit, according to this report of a two-year trial conducted by the Citrus Research Center and the Agricultural Extension Service.

Assisting in these trials were L. N. Lewis, Department of Horticultural Science, Citrus Research Center, and R. G. Platt, Agricultural Extension Service, U. C., Riverside. The trees were provided by Rancho Los Cerritos, G. D. McGrath, Manager.