共 5 条
[1]
BEATY E. R., 1960, AGRON JOUR, V52, P453
[3]
BURTON GW, 1946, J AM SOC AGRON, V38, P273
[4]
COATS RE, 1960, MISSISSIPPI AGR EXP, V23, P7
[5]
HOVELAND CS, 1961, 140 AUB U AGR EXP CI