This new volume is the first independent analysis of an important national data base, the National Resources Inventory. It cites potential uses of the NRI in controlling soil erosion; determining land use; deciding conservation treatment; classifying soils; and protecting groundwater quality. Methods for soil conservation activities, ranging from the ranking of the lands most susceptible to erosion to the measurement and prediction of both wind and water erosion, are recommended throughout the volume.
- Soil Conservation
- Copyright
- Preface
- Acknowledgments
- Contents
- Executive Summary
- A BASIC CONCLUSION
- SOME PRIORITIES
- ANALYTICAL APPLICATIONS TO SUPPORT CONSERVATION
- Program Development
- Erosion Prediction Equations
- LEVERAGING BENEFICIAL USES OF THE NRI
- Understanding the Erosion-Productivity Relationship
- Assessing Agricultural Runoff in Relation To Water Quality
- Magnitude and Scope of Future NRIs
- 1 Scope and Content of the 1982 NRI
- USES OF THE 1982 NRI
- Trend Analysis
- Classification of Soils According To Rates of Erosion
- Identification of Needs and Opportunities
- Relating the Nri To Water Quality and Other Environmental Issues
- Tool For Research and Policy Analysis
- INFORMATION FROM THE 1982 NRI
- Land Use and Soil Erosion Rates
- Soil Erosion in Relation To Soil Loss Tolerances
- Concentration of Erosion
- Soil Conservation Practices On Cropland
- 2 Improving Federal Resource Assessment Efforts
- COMPILATION AND DISSEMINATION OF NRI DATA
- Upgrading Inventory and Monitoring Functions of the SCS
- Statistical Documentation
- Presentation of Published Data
- Distribution of NRI Computer Tapes
- USE OF SENSING TECHNOLOGIES IN FUTURE NRIS
- EXPANSION OF NRI COVERAGE TO FEDERAL LANDS
- INCLUSION OF DATA RELATED TO WATER QUALITY
- 3 The Measures of Soil Erosion
- NRI ESTIMATES OF SHEET AND RILL EROSION: THE USLE
- NRI Findings On Average Usle-Factor Values
- Uncertainties Associated with C-Factor Values
- Recommendations on the USLE
- WIND EROSION ESTIMATES
- Limitations of the WEE
- Improving Wind Erosion Prediction
- EROSION BY CONCENTRATED FLOW: EPHEMERAL GULLIES
- 4 On-Farm and Off-Farm Consequences of Soil Erosion
- EFFECTS OF EROSION ON PRODUCTION COSTS
- Short-Term Costs
- Long-Term Costs
- Long-Term Productivity
- EROSION-PRODUCTIVITY MODELS
- The PI Model
- The EPIC Model
- SOIL EROSION AND WATER QUALITY
- Potential Uses of NRI Data
- 5 Assessing Conservation Practices and Land Classification Schemes
- CONSERVATION PRACTICES
- Concentration of Sheet and Rill Erosion on Cropland
- Implications for Policy and Program Administration
- THE LAND CAPABILITY CLASS SYSTEM
- Factors of Inconsistency
- Rates of Erosion: A Basis For Classification
- Regional Analyses
- Changes in Land Use
- ALTERNATIVE LAND CLASSIFICATION SCHEMES
- PROPOSED OPTIONS TO THE LCCS
- References
- Appendix
- Index
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