Mineral Nutrition Status of Valencia Orange LITERATURE CITED 1. Better fruit program. Spray and dust schedule for Citrus. Florida Citrus Commission. 1955. 2. BRYAN, O. C. The quality of citrus fruit as affected by cultural prac- tice. Proc. Fla. Sta. Hort. Soc. 53: 98-100, 1940. 3. Climatological data, Florida section. U. S. Dept. of Commerce. Weather Bureau Vol. 57-59. 1953-1955. 4. FUDGE, B. R. Relation of magnesium deficiency in grapefruit leaves to yield and chemical composition of fruit. Fla. Agri. Expt. Sta. Bull. 331. 1939. 5. JONES, D. W., N. GAMMON and R. B. FORBES. Leaching of fertilizer phosphorus in acid sandy soils as affected by lime. Fla. Agri. Expt. Sta. Circ. S-32, 1952. 6. KING, E. J. The colorimetric determination of phosphorus. Biochem. Jour. 26: 292-297. 1932. 7. Koo, R. C. J., and J. W. SITES. Mineral composition of citrus leaves and fruit as associated with position on the tree. Proc. Amer. Soc. Hort. Sci. 68: 245-252. 1956. 8. MILLER, J. R., and J. H. AXLEY. Correlation of chemical soil tests for available phosphorus with crop response, including a proposed method. Soil Sci. 82: 117-127. 1956. 9. NELLER, J. R. Mobility of phosphates in sandy soils. Soil Sci. Soc. Amer. Proc. 11: 227-230. 1946. 10. PEECH, M., and L. ENGLISH. Rapid microchemical soil tests. Soil Sci. 57: 167-195. 1944. 11. PEECH, M., and T. W. YOUNG. Chemical studies on soils from Florida citrus groves. Fla. Agri. Expt. Sta. Bull. 448. 1948. 12. REITZ, H. J., C. D. LEONARD, J. W. SITES, W. F. SPENCER, I. STEWART, and I. W. WANDER. Recommended fertilizers and nutritional sprays for citrus. Fla. Agri. Expt. Sta. Bull. 536. 1954. 13. REITZ, H. J., and W. T. LONG. Mineral composition of citrus leaves from the Indian River area of Florida. Proc. Fla. Sta. Hort. Soc. 65:32-38. 1952. 14. REITZ, H. J., and J. W. SITES. Relation between position on tree and analysis of citrus fruit with special reference to sampling and meet- ing internal grades. Proc. Fla. Sta. Hort. Soc. 61: 80-90. 1948. 15. REUTHER, W., and P. F. SMITH. A preliminary report on the relation of nitrogen, potassium, and magnesium fertilization to yield, leaf composition and the incidence of zinc deficiency in oranges. Proc. Amer. Soc. Hort. Sci. 56: 27-33. 1950. 16. REUTHER, W., and P. F. SMITH. Relation of fertilizer treatment to fruit quality of Valencia oranges. Proc. Fla. Sta. Hort. Soc. 64: 29-35. 1951.