Written by the foremost authorities in the field, this volume brings together the technical papers from which Volume 1 is drawn. The 10 papers and discussion from a National Research Council symposium cover such topics as soil erosion classification, evaluating how soil erosion damages productivity, calculating soil erosion, understanding ephemeral gully erosion, wind erosion, and the impact of range erosion on land use.
- SOIL CONSERVATION
- Copyright
- Authors
- Preface
- Contents
- 1 An Improved Soil Erosion Classification: Update, Comparison, and Extension
- EROSION ASSESSMENT: AN UPDATE TO 1982
- COMPARISON OF RKLS-BASED CLASSIFICATION SYSTEMS
- NEEDED EXTENSIONS
- SUMMARY AND CONCLUSIONS
- NOTES
- REFERENCES
- DISCUSSION
- DISCUSSION
- 2 Assessing Soil Erosion Productivity Damage
- OBJECTIVES AND SCOPE OF ANALYSIS
- CONCEPTS FOR MEASURING EROSION DAMAGE
- Compare With Versus Without
- Avoid Confounding Tillage Yield Penalty and Damage
- Distinguish Between Reparable and Residual Yield Damage
- Separate the Effects of Erosion and Technology
- Land-Neutral Technology
- Land-Complementary Technology
- Land-Substituting Technology
- Induced Technology
- Exogenous and Induced Technology
- NATURE OF PAST TECHNICAL PROGRESS: EMPIRICAL EVIDENCE FOR WINTER WHEAT YIELDS IN THE PALOUSE REGION
- COMPUTERIZED DAMAGE ASSESSMENT MODEL
- USE OF NRI DATA FOR REGIONAL AND NATIONAL EROSION DAMAGE ASSESSMENT
- NRI DATA RELEVANT FOR DAMAGE ASSESSMENT
- ADDITIONAL DATA NEEDS FOR DAMAGE ASSESSMENT
- SUMMARY AND CONCLUSIONS
- NOTES
- REFERENCES
- APPENDIX A: EROSION-COMPENSATING TECHNOLOGY
- APPENDIX B: WHEAT YIELD PROJECTION FUNCTION
- PROPERTIES OF THE PROJECTION FUNCTION
- Extremum and Slope Conditions
- Concavity
- EMPIRICAL YIELD PROJECTION MODEL
- REFERENCES
- APPENDIX C: COMPUTERIZED EROSION DAMAGE ASSESSMENT FUNCTION
- REFERENCE
- 3 Field Estimates of C Factors: How Good Are They and How Do They Affect Calculations of Erosion?
- 4 Understanding Ephemeral Gully Erosion
- DISCUSSION
- EPHEMERAL GULLY EROSION AND THE NRI
- FIELD MEASUREMENT OF EPHEMERAL GULLIES
- MATHEMATICAL PREDICTION MODELS
- REFERENCES
- 5 Wind Erosion
- 6 Erosion on Range and Forest Lands: Impacts of Land Use and Management Practices
- DISCUSSION
- SOIL LOSS TOLERANCES
- REFERENCES
- 7 Erosion Control Practices: The Impact of Actual Versus Most Effective Use
- 8 Applications of the NRI Data to Inventory, Monitor, and Appraise Offsite Erosion Damage
- 9 New Cropland in the 1982 NRI: Implications for Resource Policy
- EMERGENCE OF ERODIBLE LAND USE AS A FARM POLICY ISSUE
- POLICIES AFFECTING ERODIBLE AND MARGINAL LAND CONVERSION TO CROP USES
- CROPS AND SOIL GROUPINGS IN THE ANALYSIS
- THE NEW CROPLAND
- NEW ACRES OF PROGRAM CROPS
- PRICE SUPPORTS AND PROBLEMS WITH THE NEW CROPLAND
- Short-Term Effects of Farm Subsidies on Land Conversions and Soil Erosion
- Long-Term Effects of Farm Programs
- Productivity Damage on Land at the Margin of Production
- Water Quality Damage from Land Conversions
- PREVENTING SODBUSTING DURING PRICE SUPPORTS
- OTHER OPTIONS THAT REDUCE CONVERSION OF MARGINAL OR ERODIBLE SOILS TO CROP USES
- CONCLUSIONS
- REFERENCES
- DISCUSSION
- DISCUSSION
- 10 A Midwestern Perspective on Targeting Conservation Programs to Protect Soil Productivity
- 11 Potential Uses of the NRI in State and Local Decision Making
- SEEKING A SOLUTION
- USING THE PSU DATA BASE
- SUMMARY AND CONCLUSIONS
- REFERENCES
- DISCUSSION
- OVERALL OBSERVATIONS
- STATE AND LOCAL USES OF THE NRI
- POTENTIAL USES OF NRI DATA
- CONCLUSION
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