共 10 条
[1]
ANDERSON PJ, 1927, TOBACCO STA B, V7
[2]
BABCOCK AL, 1931, CALIF CILROGR, V16, P474
[3]
COPPER JR, 1928, ARK AGR EXP STA B, V227
[4]
FLOYD BF, 1919, FLA AGR EXP STA ANN, V1909, pR28
[5]
FRAPS GS, 1922, TEX AGR EXP STA B, V304
[7]
RUPRECHT RW, 1925, FLA AGR EXP STA ANN, pR32
[8]
STEPHENSON R. E., 1931, JOUR AMER SOC AGRON, V23, P759
[9]
TRUOG EMIL, 1930, JOUR AMER SOC AGRON, V22, P874
[10]
WAY JT, 1850, J ROY AGR SOC ENGL, V13, P123