Density and Moisture Content Measurements by Nuclear Methods

Density and Moisture Content Measurements by Nuclear Methods PDF

Author: Robin P. Gardner

Publisher:

Published: 1967

Total Pages: 56

ISBN-13:

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Sources of error that have been identified on the gamma-ray soil density gauge are: (1) sensitivity to local density variations, especially at the soil surface, (2) sensitivity to soil composition, and (3) inaccurate calibration techniques. An attempt was made to solve these problems by developing for each gauge calibration models that enable stable and homogenous non-soil standards to be used for calibration. Calibration standards and calibration models for each gauge were found and tested. In the process of developing and testing the new nuclear gauge calibration model, the dual-gauge principal of compensating these gauges for variations in soil composition was discovered. The air-gap method of using this principal is explained and was optimized by using the calibration model developed in the current study.

Soil and Environmental Analysis

Soil and Environmental Analysis PDF

Author: Keith A. Smith

Publisher: CRC Press

Published: 2000-10-12

Total Pages: 650

ISBN-13: 0824745361

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"Reviews a wide range of methods for soil physical analysis. Considers applications, accuracy, measurement time, and cost of equipment. Provides examples of applications."

Soil Compaction in Crop Production

Soil Compaction in Crop Production PDF

Author: B.D. Soane

Publisher: Elsevier

Published: 2013-10-22

Total Pages: 695

ISBN-13: 0080934005

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This book provides a global review of the mechanisms, incidence and control measures related to the problems of soil compaction in agriculture, forestry and other cropping systems. Among the disciplines which relate to this subject are soil physics, soil mechanics, vehicle mechanics, agricultural engineering, plant physiology, agronomy, pedology, climatology and economics. The volume will be of great value to soil scientists, agricultural engineers, and all those involved with irrigation, drainage and tillage. It will help to facilitate the exchange of information on current work throughout the world, as well as to promote scientific understanding and stimulate the development, evaluation and adoption of practical solutions to these widespread and urgent problems.

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