Gupta, Prem Kumar. Soil, plant, water and fertilizer analysis / P. K. Gupta - 2nd ed. - India : Agrobios , 2007 - 350 p. : ill. ; 25 cm. Includes bibliographical references. ISBN: 8177543067 Subjects--Topical Terms: Soils-- Analysis.Plants-- Analysis.Water-- Analysis. Dewey Class. No.: 631.4