Biosynthesis of amino acids according to soil fertility V. L. SheldonWM. G. BlueWM. A. Albrecht OriginalPaper Pages: 33 - 40
Nouvelle méthode de dosage des éléments minéraux fertilisants du sol par les azotobacter T. L. Wang OriginalPaper Pages: 41 - 46
Molybdenum nutrition of crop plants P. R. StoutW. R. MeagherC. M. Johnson OriginalPaper Pages: 51 - 87
The effects of glucose on impure cultures of nitrifying bacteria Jane Meikle John OriginalPaper Pages: 88 - 93
Amendment to gerretsen's technique for the preparation of plates used for studying phosphate-dissolving micro-organisms H. W. Johnston OriginalPaper Pages: 94 - 96