共 12 条
- [1] Brown HoraceT., 1897, P R SOC LONDON, V62, P160
- [4] GRABER LF, 1922, J AM SOC AGRON, V14, P298
- [5] HARRINGTON HI, 1916, J AGR RES, V6, P761
- [6] LUTE AM, 1927, B COLO EXP STA, V326, P34
- [7] MIDGLEY A. R., 1926, JOUR AMER SOC AGRON, V18, P1087
- [8] SCHMIDT DAVID, 1926, SEED WORLD, V19, P9
- [9] STAKER EV, 1925, J AM SOC AGRON, V17, P32