Havlin, John Soil fertility and fertilizers : an introduction to nutrient management John L. Havlin ... [et al.] - 7th ed - Upper Saddle River, NJ Prentice Hall 2005 - x, 515 p. : ill. (some col.), maps ; 26 cm Includes bibliographical references and index ISBN: 9788120330177 ISSN: 98038911 Subjects--Topical Terms: Crops - NutritionFertilizersSoil fertility Dewey Class. No.: 631.8 HAV