For this central California orange trial (cv. Fukumoto), Vitazyme proved to be a good improver of orange yield and quality. While the yield increase was only 1.3%, the number of high-value export quality oranges, shipped to Korea and Japan, was increased by nearly 10%, which translated into a sizable income increase. Total cartons of export grade fruit were 692.7 cartons/acre for the control, and 791.1 cartons/acre for the Vitazyme treatment. This improvement resulted in an income increase of $196.80/acre. Fruit size for the Vitazyme treatment was slightly smaller, reflecting a somewhat higher fruit load.