TY - RPRT TI - Parameterizing century to model cultivated and noncultivated sites in the Loess region of western Iowa AU - Kristen L. Manies AU - Jennifer W. Harden AU - Larry Kramer AU - William Parton PY - 2000 DO - 10.3133/ofr00508 UR - https://pubs.usgs.gov/publication/ofr00508 ID - ofr00508 ER -