共 12 条
[1]
AHLGREN HL, 1947, J AM SOC AGRON, V39, P240
[2]
BROWN BA, 1936, 209 CONN AGR EXP STA
[3]
CHIASSON T. C., 1960, CANADIAN JOUR PLANT SCI, V40, P235
[4]
HARLAN J, 1960, B547 OKL AGR EXP STA
[5]
HEADY EO, 1955, 424 IOW AGR EXP STA
[6]
Mitscherlich E. A., 1909, LANDWIRTSCHAFTLICHE, V38, P537
[7]
PASCHAL JL, 1956, USDA1141 TECH B
[8]
PASCHAL JL, 1953, FM104 USDA
[9]
PESEK J, 1956, SOIL SCI SOC AM P, V20, P240
[10]
ROBINSON R. R., 1937, Journal of the American Society of Agronomy, V29, P349