共 10 条
[1]
ALLMARAS RR, 1966, USDA7 ARS CONS RES R
[2]
CHEPIL W. S., 1962, SOIL SCI SOC AMER PROC, V26, P4
[3]
COLVILLE WL, 1964, NEBR EXP STA QUARTER
[4]
HASHBARGEN PR, 1965, ROW WIDTH CORN SOYBE
[5]
KOHNKE H, 1963, AGGREGATE ANALYSIS S
[6]
MERDERSKI HJ, 1965, T ASAE, P322
[7]
MEYER L. D., 1960, Soil Science Society of America. Proceedings, V24, P319
[8]
ROBBINS PR, 1966, ECONOMIC MARKETING I
[10]
WISCHMEIER WALTER H., 1960, SOIL SCI SOC AMER PROC, V24, P322