共 49 条
- [31] FREE G. R., 1960, Agric. Engng., V41, P447
- [32] Free G.R., 1960, AGRIC ENGNG ST JOSEP, V41, P455
- [33] FREE GR, 1952, AGR ENG, V33, P496
- [35] HILLEL D, 1964, 8TH T INT C SOIL SCI, V1, P53
- [36] Hudson N., 1971, SOIL CONSERVATION
- [37] KUIPERS H., 1957, NETHERLANDS JOUR AGRIC SCL, V5, P255
- [38] Laws JO, 1943, EOS T AM GEOPHYS UN, V24, P452
- [39] Laws JO, 1941, EOS T AM GEOPHYS UN, V22, P709
- [40] LEMOS PETEZVAL, 1957, SOIL SCI SOC AMER PROC, V21, P485