共 49 条
[1]
ALWAY FJ, 1911, 25 NEBR AGR EXP STA, P56
[2]
ARNY AC, 1915, J AM SOC AGRON, V7, P173
[3]
BAL DV, 1922, AGR J INDIA, V17, P133
[4]
BRIGHAM RO, 1971, SOIL SCI, V3, P155
[6]
CARR RH, 1916, IND ACAD SCI P, P398
[7]
COFFEY GN, 1915, J AM SOC AGRON, V7, P129
[8]
CRAIG J, 1902, AGR EXP STA B, V198, P93
[9]
DUGGAR JF, 1899, ALA AGR EXP STA B, V105, P127
[10]
DUGGAR JF, 1902, ALA AGR EXP STA B, V120, P121