ធនធាន ដាក់ស្លាក: Soil Surveys
12 items found (Showing 1 - 10) Next
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01 មករា 1991 474 pp. : tables
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The chapters in this monograph have been written to provide examples of models of component processes necessary to simulate the dynamics of crop and soil systems. The information is intended to be useful to researchers, extension and other professional technologists, and teachers.
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01 មករា 1983 In 1976 a comprehensive soil survey of the Kingdom of Tonga was done by the N.Z. Soil Bureau.This booklet describes the kinds of soils which are found in the Kingdom of Tonga, how they have been formed, where they occur in the landscape, and their good and bad features.
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Eight full papers and extended summaries of ten more from a November 1992 symposium in Minneapolis wrestle with what soil quality means in theory and practice, identify indices to measure it, and assess its biological importance. The collection is seen as the beginning of raising scientific study...
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12 មករា 1984 Major fieldwork for this Lee County, Florida soil survey was completed in 1981 withsoil names and descriptions approved at that time. 2 copies
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01 មករា 1991 The result of a symposium held at the Annual Meeting of the Soil Science Society of America, in Las Vegas, October 1989. The objective of the symposium was to establish a forum for creative purposes in developing guidelines and procedures for quantitative description of map unit composition. 270...
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This training gives a broad overview and introduction to some basic soil characteristics: phases (solid, liquid, gas), texture, density, structure, reaction (pH), plant-water relationships, organic matter, and nutrients. After some classroom discussion we wentout to into the ECHO Farm wherewe...
- also available in:
- English (en)
- ไทย (th)
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This 1/2 day training gave abroad overview and introduction to some basic soil characteristics: phases (solid, liquid, gas), texture, density, structure, reaction (pH), plant-water relationships, organic matter, and nutrients. After some classroom discussion we went head out to into the ECHO Farm...
- also available in:
- ไทย (th)
- English (en)
-
The techniques described in this booklet represent a first step toward low-technology environmental analysis. Six tests are described - soil pH, soil texture, percolation, dissolved minerals, sodium in water, and coliform bacteria. 31 pages, tables
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01 មករា 1979 This publication aims to describe the special requirements of soil survey for irrigation development, and assumes that the reader is familiar with basic soil science and soil survey techniques. It does not deal with other aspects of soil studies such as soil conservation or soil fertility...