Special Report

Special Report

Author: National Research Council (U.S.). Highway Research Board

Publisher:

Published: 1972

Total Pages: 988

ISBN-13:

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Predicting Rainfall Erosion Losses

Predicting Rainfall Erosion Losses

Author: Walter H. Wischmeier

Publisher:

Published: 1978

Total Pages: 70

ISBN-13:

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The Universal Soil Loss Equation (USLE) enables planners to predict the average rate of soil erosion for each feasible alternative combination of crop system and management practices in association with a specified soil type, rainfall pattern, and topography. When these predicted losses are compared with given soil loss tolerances, they provide specific guidelines for effecting erosion control within specified limits. The equation groups the numerous interrelated physical and management parameters that influence erosion rate under six major factors whose site-specific values can be expressed numerically. A half century of erosion research in many States has supplied information from which at least approximate values of the USLE factors can be obtained for specified farm fields or other small erosion prone areas throughout the United States. Tables and charts presented in this handbook make this information readily available for field use. Significant limitations in the available data are identified.


Soil Physical Measurement and Interpretation for Land Evaluation

Soil Physical Measurement and Interpretation for Land Evaluation

Author: Keppel Coughlan

Publisher: CSIRO PUBLISHING

Published: 2002-11-26

Total Pages: 392

ISBN-13: 064309959X

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Soil physical measurements are essential for solving many natural resource management problems. This operational laboratory and field handbook provides, for the first time, a standard set of methods that are cost-effective and well suited to land resource survey. It provides: *practical guidelines on the soil physical measurements across a range of soils, climates and land uses; *straightforward descriptions for each method (including common pitfalls) that can be applied by people with a rudimentary knowledge of soil physics, and *guidelines on the interpretation of results and integration with land resource assessment. Soil Physical Measurement And Interpretation for Land Evaluation begins with an introduction to land evaluation and then outlines procedures for field sampling. Twenty detailed chapters cover pore space relations, water retention, hydraulic conductivity, water table depth, dispersion, aggregation, particle size, shrinkage, Atterburg limits and strength. The book includes procedures for estimating soil physical properties from more readily available data and shows how soil physical data can be integrated into land planning and management decisions.


Conservation in Perspective

Conservation in Perspective

Author: A. Warren

Publisher:

Published: 1983

Total Pages: 494

ISBN-13:

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Reflects the changes that have taken place in the nature conservation movement over the last decade. This collection of essays shows a greater focussing of interest onto critical issues of nature conservation itself rather than on environmental issues. Covers habitats, elements of the ecosystem, and some of the political and organizational activity currently of interest.