Affect of Fertilization and Irrigation on Tobacco


 Distribution and amount of rainfall are of much importance
 in the production of tobacco. This is indicated by the variable
 response of irrigation and fertilizer treatments during the three
 years. Based on all three years' data, a cropping practice of
 lupine followed by corn and then tobacco, combined with 1,600
 pounds per acre of fertilizer (800 + 800-pound split application)
 and one-half inch application of irrigation produced the largest
 amount of high quality tobacco.
 Soil moisture from irrigation alone is insufficient to enable any-
one to predict with a marked degree of accuracy the yield or qual-
ity of leaf to be produced during any particular year. Environ-
mental factors such as temperature, diseases and rainfall have
much effect on a tobacco crop. Results of this study suggest
that irrigation should be a profitable practice in the growing of
tobacco.
 ACKNOWLEDGMENTS
 The writers gratefully acknowledge the helpful suggestions and assis-
tance given by Dr. W. D. Hanson, former agronomist, College of Agricul-
ture, University of Florida, presently Biometrican in charge of Biometrical
Services, USDA, Plant Industry Station, Beltsville, Maryland; also to Tom
Adams, G. J. Gann and Thomas A. Monday, field assistants, for their
splendid cooperation in managing and collecting field plot data.

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