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- [46] Studies on soil reaction II The colorimetric determination of the hydrogen ion concentration in soils and aqueous soil extracts - (Preliminary communication) JOURNAL OF AGRICULTURAL SCIENCE, 1921, 11 : 45 - 65
- [47] INFLUENCE OF THE HYDROGEN-ION CONCENTRATION (PH = 4), THE OXYGEN-PRESSURE AND THE N2O-PARTIAL-PRESSURE ON THE DENITRIFYING CAPACITY OF DIFFERENT SOILS LANDWIRTSCHAFTLICHE FORSCHUNG, 1983, 36 (3-4): : 270 - 284