M. Nafawaah S. STUDY OF MINERALS THAT CONTROLLED CALCIUM,MAGNESIUM AND IRON SOLUBILITY AND THEIR RELATION SHIPS WITH SOIL CONSERVATION USING SOLUBILITY DIAGRAMS. IRAQI JOURNAL OF AGRICULTURAL SCIENCES [Internet]. 22Dec.2017 [cited 29Nov.2019];48(6 B). Available from: http://jcoagri.uobaghdad.edu.iq/index.php/intro/article/view/276