an introduction to nutrient management Havlin, John. text Upper Saddle River, N.J Pearson Prentice Hall c2005 7th ed. monographic xi, 515 p. : ill. ; 27 cm. John L. Havlin ... [et al.]. Includes bibliographical references and index. Fertilizers Soil fertility Crops Nutrition S633 .S715 2005 631.8 0130278246 2004044751 UOEL 000 20150415160114.0 13575423