共 10 条
[4]
McGEORGE W. T., 1937, JOUR AMER SOC AGRON, V29, P841
[5]
MCGEORGE WT, 1935, ARIZ AGR EXP STA TEC, V57
[6]
MCGEORGE WT, 1937, J ASS OFF AGR CHEM, V20, P220
[7]
PEECH M, 1936, ABS W SOC SOIL SC, V9
[8]
SEWELL MC, 1932, KANS AGR EXP STA DIR, V29
[9]
WHITNEY RS, 1937, ABS W SOC SOIL SCI, V16
[10]
Wilcox, 1936, SCI AGR, V16, P225