BOARD OF CONTROL P. K. YONGE, Chairman, Pensacola RAYMER F. MAGUIRE, Orlando A. H. BLENDING, Bartow FRANK J. WIDEMAN, West Palm Beach W. B. DAVIS, Perry J. T. DIAMOND, Secretary, Tallahassee STATION EXECUTIVE STAFF JOHN J. TIGERT, M.A., LL.D., President PR. M. FULGHUM, B.S.A., Asst. Editor WILMON NEWELL, D.Sc., Director IDA KEELING CRESAP, Librarian H. HAROLD HUME, M.S., Asst. Dir., Re- RUBY NEWHALL, Secretary search K. H. GRAHAM, Business Manager S. T. FLEMING, A.B., Asst. Dir., Admin. RACHEL McQUARRIE, Accountant J. FRANCIS COOPER, M.S.A., Editor MAIN STATION-DEPARTMENTS AND INVESTIGATORS AGRONOMY W. E. STOKES, M.S., Agronomist W. A. LEUKEL, Ph.D., Associate G. E. RITCHEY, M.S.A., Assistant* FRED H. HULL, M.S., Assistant J. D. WARNER, M.S.. Assistant JOHN P. CAMP, M.S.A., Assistant ANIMAL HUSBANDRY A. L. SHEALY, D.V.M., Veterinarian in Charge E. F. THOMAS, D.V.M., Asat. Veterinarian R. B. BECKER, Ph.D., Associate in Dairy Husbandry. W. M. NEAL, Ph.D., Assistant in Animal Nutrition C. R. DAWSON, B.S.A., Assistant Dairy Investigations CHEMISTRY R. W. RUPRECHT, Ph.D., Chemist R. M. BARNETTE, Ph.D., Associate C. E. BELL, M.S., Assistant J. M. COLEMAN, B.S., Assistant H. W. WINSOR, B.S.A., Assistant H. W. JONES, B.S., Assistant COTTON INVESTIGATIONS E. F. GROSSMAN, M.A., Assistant P. W. CALHOUN, B.S., Assistant ECONOMICS, AGRICULTURAL C. V. NOBLE, Ph.D., Agricultural Economist BRUCE McKINLEY. A.B., B.S.A., Associate M. A. BROOKER, Ph.D., Assistant ECONOMICS, HOME OUIDA DAVIS ABBOTT, Ph.D., Head L. W. GADDUM, Ph.D., Biochemist C. F. AHMANN, Ph.D., Physiologist ENTOMOLOGY J. R. WATSON, A. M., Entomologist A. N. TISSOT, M.S., Assistant H. E. BRATLEY, M.S.A., Assistant L. W. ZIEGLER, B.S., Assistant HORTICULTURE A. F. CAMP, Ph.D., Horticulturist HAROLD MOWRY, B.S.A., Associate M. R. ENSIGN, M.S., Assistant A. L. STAHL, Ph.D., Assistant G. H. BLACKMON, M.S.A., Pecan Culturist C. B. VAN CLEEF, M.S.A., Greenhouse Foreman PLANT PATHOLOGY W. B. TISDALE, Ph.D., Plant Pathologist G. F. WEBER, Ph.D., Associate A. H. EDDINS, Ph.D., Assistant K. W. LOUCKS. M.S.. Assistant ERDMAN WEST, M.S., Mycologist BRANCH STATION AND FIELD WORKERS L. O. GRATZ, Ph.D., Asso. Plant Pathologist in charge, Tobacco Exp. Sta. (Quincy) R. R. KINCAID, M.S., Assistant Plant Pathologist (Quincy) W. A. CARVER, Ph.D., Assistant, Cotton Investigations (Quincy) RAYMOND M. CROWN, B.S.A., Field Asst., Cotton Investigations (Quincy) JESSE REEVES, Farm Superintendent, Tobacco Experiment Station (Quincy) J. H. JEFFERIES, Superintendent, Citrus Experiment Station (Lake Alfred) GEO. D. RUEHLE, Ph.D., Assistant Plant Pathologist (Lake Alfred) W. A. KUNTZ, A.M., Assistant Plant Pathologist (Lake Alfred) B. R. FUDGE, Ph.D., Assistant Chemist (Lake Alfred) W. L. THOMPSON, B.S., Assistant Entomologist (Lake Alfred) R. V. ALLISON, Ph.D., Soils Specialist in charge Everglades Experiment Sta. (Belle Glade) R. W. KIDDER, B.S., Foreman, Everglades Experiment Station (Belle Glade) R. N. LOBDELL, M.S., Assistant Entomologist (Belle Glade) F. D. STEVENS, B.S., Sugarcane Agronomist (Belle Glade) H. H. WEDGEWORTH, M.S., Associate Plant Pathologist (Belle Glade) B. A. BOURNE, M.S., Associate Plant Physiologist (Belle Glade) J. R. NELLER, Ph.D., Associate Biochemist (Belle Glade) A. DAANE, Ph.D., Associate Agronomist (Belle Glade) FRED YOUNT, Office Assistant (Belle Glade) M. R. BEDSOLE, M.S.A., Assistant Chemist (Belle Glade) A. N. BROOKS, Ph.D., Associate Plant Pathologist (Plant City) R. E. NOLEN, M.S.A., Field Assistant in Plant Pathology (Plant City) A. S. RHOADS, Ph.D., Associate Plant Pathologist (Cocoa) C. M. TUCKER, Ph.D., Associate Plant Pathologist (Hastings) H. S. WOLFE, Ph.D., Associate Horticulturist (Homestead) L. R. TOY, B.S.A., Assistant Horticulturist (Homestead) STACY O. HAWKINS, M.A., Field Assistant in Plant Pathology (Homestead) D. G. A. KELBERT, Field Assistant in Plant Pathology (Bradenton) FRED W. WALKER, Assistant Entomologist (Monticello) D. A. SANDERS, D.V.M., Associate Veterinarian (West Palm Beach) M. N. WALKER, Ph.D., Associate Plant Pathologist (Leesburg) W. B. SHIPPY, Ph.D., Assistant Plant Pathologist (Leesburg) C. C. GOFF, M.S., Assistant Entomologist (Leesburg) J. W. WILSON, Ph.D., Assistant Entomologist (Pierson) *In cooperation with U. S. Department of Agriculture.