Study of soil characteristics as developed in a grass mulch system of vegetable cultivation in Jamaica Auteur(s) : Davis, Malcolm S | Partager |
Estudio fisiológico de unos tipos predominantes de tierras de Guatemala Auteur(s) : Deger, Erwin Conradin, d. 1941 Pensabene, Augusto | Partager |
Analisis quimico de suelos Auteur(s) : Saiz del Rio, J. F Bornemisza, Elemer | Partager |