共 27 条
- [1] Aldrice WW, 1935, J AGRIC RES, V50, P0975
- [3] A field outfit for determining the moisture content of soils [J]. SOIL SCIENCE, 1938, 46 (01) : 107 - 111
- [4] BOUYOUCOS GJ, 1940, MICH AGR EXP STA TEC, V172
- [5] EDLEFSEN NE, 1933, AGR ENG, V14, P243
- [6] EHRENBURG DO, 1937, ENG NEWS-REC, V118, P708
- [8] HECK AF, 1934, J AM SOC AGRON, V26, P274
- [10] LEWIS MR, 1936, OREG STATE HORT SOC, V28, P164