Magnesium status of some Philippine soils [microform].

Détails bibliographiques
Auteur principal:	Nartea, Roberts Negranza 1933-
Format:	Visual Material
Langue:	English
Publié:	Quezon City Photoduplication Service, University of the Philippines Library 1977.
Sujets:	Soils > Philippines. Soils > Magnesium content.