共 9 条
- [1] BREMER H., 1936, Angewandte Botanik, V18, P204
- [2] Garner WW, 1923, J AGRIC RES, V23, P0871
- [4] Magruder R, 1937, J AGRIC RES, V54, P0719
- [5] McClelland TB, 1928, J AGRIC RES, V37, P0603
- [6] PARKER MW, IN PRESS SOIL SCI
- [7] SNEDECOR GW, 1940, STATISTICAL METHODS
- [8] WILSON AL, 1934, CORNELL AGR EXP STA, V156
- [9] [No title captured]