Cet ouvrage est une référence en agronomie, chimie agricole et physiologie des plantes. Le livre comprend des études approfondies sur les relations entre les plantes et leur environnement, ainsi que les méthodes de fertilisation des sols et de contrôle des maladies des plantes. Il est destiné aux étudiants en agronomie et aux professionnels du secteur.This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it.This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.