Soil conservation : assessing the national resources inventory. Volume 1

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
	NOTES TO APPENDIX
Index