共 18 条
[1]
ARMSTRONG DE, 1968, ENVIRON SCI TECHNOL, V9, P683
[2]
BICKI T, 1986, CROPS SOILS, V38, P25
[3]
BRAKER WL, 1981, SOIL SURVEY CTR COUN
[4]
Dick W. A., 1987, Effects of conservation tillage on groundwater quality - nitrates and pesticides,, P125
[5]
Fishel D.K., 1986, 854202 US GEOL SURV
[8]
Kaufman D D, 1970, Residue Rev, V32, P235
[9]
LAZOWSKI EJ, 1986, THESIS PENNSYLVANIA