共 9 条
- [2] CROWTHER EM, 1928, P INT SOC SOIL SCI W, V1, P394
- [3] Some comments on the hydrometer method for studying soils [J]. SOIL SCIENCE, 1928, 26 (04) : 261 - 263
- [4] ODEN S, 1926, P 4 INT C PED ROM CO, V1, P52
- [5] PRATOLONGO U, 1917, STAZ SPER AGRAR ITAL, V50, P117
- [6] A new type of hydrometer for the mechanical analysis of soils [J]. SOIL SCIENCE, 1932, 33 (04) : 241 - 248
- [7] PURI AN, 1928, AGR RES I PUSA B, V175
- [8] PURI AN, 1929, MEM DEP AGR INDIA CH, V10, P209
- [9] WIGNER G, 1918, LANDW VERS STA, V91, P41