TY - RPRT TI - Analytical results of soil sampling by two field methods; a comparison AU - R. C. Severson AU - F. Paveglio AU - D. B. Hatfield AU - Paul H. Briggs PY - 1987 DO - 10.3133/ofr87354 UR - https://pubs.usgs.gov/publication/ofr87354 ID - ofr87354 ER -