In: D.L. Sparks, A.L. Page, P.A. Helmke, R.H. Loeppert, P.N. Soltanpura, M.A. Tabatai, C.T. Johnston and M.E. Summer, Editors, Methods of Soil Analysis — Chemical Methods, Soil Science Society of America, Inc., American Society of Agronomy, Inc., Dordrecht/Boston/London (1996), p. 1,358. |