Revised Universal Soil Loss Equation for Western Rangelands. Weltz, M. A., Renard, K. G., & Simanton, J. R. In volume 150, of General Technical Report RM, pages 104–111. Rocky Mountain Forest and Range Experiment Station, U.S. Department of Agriculture, Forest Service, 1987.
abstract   bibtex   
The Universal Soil Loss Equation has been revised to accommodate field conditions found throughout the western United States. The revision uses a subfactor approach to evaluate the "C" factor and additional algorithms to describe the "LS" and "P" factors. The revised "C" factor is now the product of subfactors: PLU (prior land use), CC (vegetation canopy cover), SC (surface ground cover), and SR. (surface roughness). Included in these subfactors are conditions for vegetation canopy height and root biomass. Algorithms for "LS" consider non- linear interactions between slope steepness and length. The algorithms for "P" are based on surface roughness, slope steepness, and runoff reduction. [\n] A procedure is presented for estimating, from above ground biomass, the root biomass in the upper 100 mm of the soil profile of various rangeland vegetation types. A sensitivity analysis of the root biomass input to the subfactors PLU and SR is presented to illustrate the importance of root biomass to erosion from rangelands. [\n] Rangeland soil loss estimates are made from a wide range of assumed factor values using the old and revised USLE. Also, each equation is used to estimate soil loss and the results are compared to actual soil loss measure- ments from simulated rainfall plots.
@incollection{weltzRevisedUniversalSoil1987,
  title = {Revised {{Universal Soil Loss Equation}} for Western Rangelands},
  author = {Weltz, M. A. and Renard, K. G. and Simanton, J. R.},
  year = {1987},
  volume = {150},
  pages = {104--111},
  publisher = {{Rocky Mountain Forest and Range Experiment Station, U.S. Department of Agriculture, Forest Service}},
  issn = {0277-5786},
  abstract = {The Universal Soil Loss Equation has been revised to accommodate field conditions found throughout the western United States. The revision uses a subfactor approach to evaluate the "C" factor and additional algorithms to describe the "LS" and "P" factors. The revised "C" factor is now the product of subfactors: PLU (prior land use), CC (vegetation canopy cover), SC (surface ground cover), and SR. (surface roughness). Included in these subfactors are conditions for vegetation canopy height and root biomass. Algorithms for "LS" consider non- linear interactions between slope steepness and length. The algorithms for "P" are based on surface roughness, slope steepness, and runoff reduction. 

[\textbackslash n] A procedure is presented for estimating, from above ground biomass, the root biomass in the upper 100 mm of the soil profile of various rangeland vegetation types. A sensitivity analysis of the root biomass input to the subfactors PLU and SR is presented to illustrate the importance of root biomass to erosion from rangelands. 

[\textbackslash n] Rangeland soil loss estimates are made from a wide range of assumed factor values using the old and revised USLE. Also, each equation is used to estimate soil loss and the results are compared to actual soil loss measure- ments from simulated rainfall plots.},
  keywords = {*imported-from-citeulike-INRMM,~INRMM-MiD:c-12584361,rusle,soil-erosion,soil-resources,stoniness},
  lccn = {INRMM-MiD:c-12584361},
  series = {General Technical Report {{RM}}}
}

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