共 7 条
[2]
BLANCHAR R. W., 1964, AGRON J, V56, P218
[4]
FITTS JW, 1956, 121 NC AGR EXP STA T
[5]
PECK TR, 1962, THESIS U WISCONSIN
[6]
SKINNER S. I. M., 1959, CANADIAN JOUR SOIL SCI, V39, P197
[7]
1954, USDA60 AGR HANDB