References for the web pages
Apple Nutrition. 1966. Boynton, D. and G. H. Oberly. In Temperate to Tropical Fruit Nutrition, N. F. Childers, ed. New Jersey.
Fruit Trees for Entire State.1976 reprint. Publication number FG-28a. Cooperative Extension Service. College of Agriculture. Washington State University.
Interpretation of Leaf Analyses for Tree Fruits in Washington. 1976 reprint. Publication number FG-28g. Cooperative Extension Service. College of Agriculture. Washington State University.
Interpreting Soil Tests for Washington Orchards. 2000. F.J. Peryea. Washington State University-Tree Fruit Research and Extension Center, Wenatchee, WA.
The Nature and Properties of Soil. 1990. N.C. Brady, ed. New York.
Nutrient Content of Fruit Trees in Washington.1976 reprint. Publication number FG-28f. Cooperative Extension Service. College of Agriculture. Washington State University.
Nutrient Disorders in Tree Fruits. 1972. N.R. Benson. PNW Bulletin 121.
Orchard Nutrition Management. Stiles, W.C. and W.S. Reid. Information Bulletin 219. Cornell Cooperative Extension.
Plant Physiology. 1991. Taiz, L. and E. Zeiger, eds. California
Shear and Faust. 1980. Nutritional Ranges in deciduous tree fruits and nuts. Hort Reviews 2:142-163.
Soil Fertility and Fertilizers. 1985.Tisdale, S. L., Nelson, W.L., Beaton, J.D., and J.L. Havlin, eds. 5th edition. New York.
Temperate Zone Pomology. 1978. M.N. Westwood. San Francisco.
Tree Fruit Nutrition: shortcourse proceedings. 1994. Peterson, A. B. and R.G. Stevens, ed. Good Fruit Grower, Yakima, WA.
July 9, 2004