共 12 条
[2]
EVANS T. W., 1931, Journal of the Board of Greenkeeping Research, V2, P119
[3]
GRABER L. F., 1931, JOUR AMER SOC AGRON, V23, P938
[6]
LAIRD AS, 1930, FLA AGR EXP STA B, V211
[7]
LEUKEL WA, 1930, P 1 INT C SOIL SCI, V219
[8]
Marbut CF, 1928, 1 INT C SOIL SCI COM 1 INT C SOIL SCI COM, P1
[9]
SPRAGUE HB, 1930, N J AGR EXP STA B, V497
[10]
TRUOG EMIL, 1930, JOUR AMER SOC AGRON, V22, P874