Havlin ,J.L Soil fertility and fertilizers : an introduction to nutrient management / John L. Havlin, James D.Breaton, Samuel L.Tisdale(et al) - 7th ed. - New Jersey Pearson Prentice Hall 2005. - xi, 515 p. : ill. ; Hbk ISBN: 0130278246 Subjects--Topical Terms: Fertilizers.Soil fertility.Crops--Nutrition. LC Class. No.: S633.S715 / 2005