共 50 条
- [42] RAPID METHOD FOR DETERMINING SOIL MOISTURE SOIL SCIENCE SOCIETY OF AMERICA PROCEEDINGS, 1950, 15 : 391 - 393
- [47] METHOD FOR DETERMINING AMMONIUM FIXATION IN SOIL SOVIET SOIL SCIENCE-USSR, 1971, 3 (06): : 740 - +
- [48] On the estimation of nitrates in soils by the phenol disulphonic acid method JOURNAL OF AGRICULTURAL SCIENCE, 1923, 13 : 60 - 62
- [49] A METHOD FOR PURIFICATION OF VEGETABLE EXTRACTS FOR DETERMINING ENDOGENOUS GIBBERELLINS FIZIOLOGIYA I BIOKHIMIYA KULTURNYKH RASTENII, 1984, 16 (02): : 196 - 200