TY  - RPRT
TI  - Long-term tillage and crop rotation effects on residual nitrate in the crop root zone and nitrate accumulation in the intermediate vadose zone
AU  - A. Katupitiya
AU  - D.E. Eisenhauer
AU  - R.B. Ferguson
AU  - R.F. Spalding
AU  - F.W. Roeth
AU  - M.W. Bobier
PY  - 1997
UR  - https://pubs.usgs.gov/publication/70019694
ID  - 70019694
ER  -