THE INFLUENCE OF MANURE AND IRRIGATION WATER ON THE CARBON, PHOSPHORUS, CALCIUM AND MAGNESIUM OF THE SOIL
THE FIXATION OF NITROGEN BY AZOTOBACTER IN A DISPLACED SOLUTION AND IN SOIL RESIDUE THEREFROM
THE AVAILABILITY OF SUBSOIL POTASH
ALKALI STUDIES
THE TERNARY SYSTEMS CaO-Fe2O3-CaSO4 AND CaO-Al2A2-CaSO4 AS EXPLAINING THE RETENTION OF SULFATES BY HEAVILY LIMED SOIL
THE HEAT OF WETTING AS A NEW MEANS OF ESTIMATING THE COLLOIDAL MATERIAL IN SOILS