共 9 条
- [2] Eaton FM, 1942, J AGRIC RES, V64, P0357
- [3] Garner WW, 1930, J AGRIC RES, V40, P0627
- [5] RIRIE D, 1952, SOIL SCI, V73, P1, DOI 10.1097/00010694-195201000-00001
- [6] SAYRE JD, 1952, OHIO AGR EXPT STA RE, V723
- [7] SHIVE JW, 1942, N J AGR EXPT STA B, V636
- [8] Tottingham W. E., 1919, J AM SOC AGRON, V11, P1
- [9] 1952, ISOTOPES