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Effects of compaction on soil strength
Journal of Terramechanics, 1973, Vol. 9, No. 3, pp. 99 to 100. Pergamon Press Printed in Great Britain.
ABSTRACTS 48.
W. J. Chancellor. Effects of compaction on soil strength. Compaction of Agricultural Soils ASAE Monograph (1971), pp. 190-212; 19 figs. Soil strength is dependent upon soil moisture, structural arrangement, internal friction and cohesion. Processes that affect soil strength are discussed.
49.
G. T. Cohron. Forces causing soil compaction. Compaction of Agricultural Soils. ASAE Monograph. (1971), pp. 106--119; 9 figs. The importance of design of vehicle, tires and tillage implements to decrease compaction of the soil is stressed. Improved operation techniques such as traffic control and operation of tractors at higher speeds are discussed.
50.
A. W. Cooper. Effect of tillage on soil compaction. Compaction of Agricultural Soils. ASAE. Monograph (1971), pp. 315-364; 52 refs., 44 figs. Basic tillage operations and their compactive effects are discussed. The degree of compaction desirable in certain phases of crop growth are defined qualitatively. Stress is placed on a theoretical discussion of soil reaction to tillage tools and a comprehensive survey of the types of tillage tools in common usage and their respective functions.
51.
D. R. Freitag. Methods of measuring soil compaction. Compaction of Agricultural Soils. ASAE Monograph (1971), pp. 47-103; 84 refs., 46 figs. Methods presented used to assess porosity, pore size distribution and soil fabric are described and the limitations of each of these methods are noted.
52.
W. R. Gill. Economic assessment of soil compaction. Compaction of Agricultural Soils, ASAE Monograph (1971), pp. 431-458; 60 refs., 2 figs. The economic impact of soil compaction is assessed by consideration of reduction in crop yields, energy required to loosen the soil, increased production costs and the cost of remedial procedures. Principles for vehicle operation to reduce compaction effects are presented.
53.
A. R. Grable. Effects of compaction on content and transmission of air in soils. Compaction of
Agricultural Soils. ASAE Monograph (1971), pp. 154-164; 4 figs. The effects of compaction on the composition and flow of soil gases are discussed. Topics discussed in this regard include soil water suction, temperature depth and stratification. 54.
55.
W. L. Harris. The soil compaction process. Compaction of Agricultural Soils. ASAE Monograph (1971), pp. 9-44; 46 refs., 26 figs. The compaction phenomenon is discussed in terms of soil structure. Past efforts to construct mathematical compaction behaviour models are reviewed and recommendations for future research are made. T. A. Harwood and R. N. Yong. Northland vehicle considerations. Proceedings Canadian Northern
Pipeline Research Conference (1792), pp. 129-145; 5 refs., 7 figs. Concepts essential to development of criteria for a vehicle suitable for use in Northern Canada are presented. Deficiencies noted in recent vehicle tests are reported. 56.
W. D. Kemper, B. A. Stewart and L. K. Porter. Effects of compaction on soil nutrient status. Compaction of Agricultural Soils. ASAE Monograph (1971), pp. 178-189; 6 figs. The effects of compaction on diffusion mass flow and mineralization of nutrients are outlined. 99
ABSTRACTS 48.
W. J. Chancellor. Effects of compaction on soil strength. Compaction of Agricultural Soils ASAE Monograph (1971), pp. 190-212; 19 figs. Soil strength is dependent upon soil moisture, structural arrangement, internal friction and cohesion. Processes that affect soil strength are discussed.
49.
G. T. Cohron. Forces causing soil compaction. Compaction of Agricultural Soils. ASAE Monograph. (1971), pp. 106--119; 9 figs. The importance of design of vehicle, tires and tillage implements to decrease compaction of the soil is stressed. Improved operation techniques such as traffic control and operation of tractors at higher speeds are discussed.
50.
A. W. Cooper. Effect of tillage on soil compaction. Compaction of Agricultural Soils. ASAE. Monograph (1971), pp. 315-364; 52 refs., 44 figs. Basic tillage operations and their compactive effects are discussed. The degree of compaction desirable in certain phases of crop growth are defined qualitatively. Stress is placed on a theoretical discussion of soil reaction to tillage tools and a comprehensive survey of the types of tillage tools in common usage and their respective functions.
51.
D. R. Freitag. Methods of measuring soil compaction. Compaction of Agricultural Soils. ASAE Monograph (1971), pp. 47-103; 84 refs., 46 figs. Methods presented used to assess porosity, pore size distribution and soil fabric are described and the limitations of each of these methods are noted.
52.
W. R. Gill. Economic assessment of soil compaction. Compaction of Agricultural Soils, ASAE Monograph (1971), pp. 431-458; 60 refs., 2 figs. The economic impact of soil compaction is assessed by consideration of reduction in crop yields, energy required to loosen the soil, increased production costs and the cost of remedial procedures. Principles for vehicle operation to reduce compaction effects are presented.
53.
A. R. Grable. Effects of compaction on content and transmission of air in soils. Compaction of
Agricultural Soils. ASAE Monograph (1971), pp. 154-164; 4 figs. The effects of compaction on the composition and flow of soil gases are discussed. Topics discussed in this regard include soil water suction, temperature depth and stratification. 54.
55.
W. L. Harris. The soil compaction process. Compaction of Agricultural Soils. ASAE Monograph (1971), pp. 9-44; 46 refs., 26 figs. The compaction phenomenon is discussed in terms of soil structure. Past efforts to construct mathematical compaction behaviour models are reviewed and recommendations for future research are made. T. A. Harwood and R. N. Yong. Northland vehicle considerations. Proceedings Canadian Northern
Pipeline Research Conference (1792), pp. 129-145; 5 refs., 7 figs. Concepts essential to development of criteria for a vehicle suitable for use in Northern Canada are presented. Deficiencies noted in recent vehicle tests are reported. 56.
W. D. Kemper, B. A. Stewart and L. K. Porter. Effects of compaction on soil nutrient status. Compaction of Agricultural Soils. ASAE Monograph (1971), pp. 178-189; 6 figs. The effects of compaction on diffusion mass flow and mineralization of nutrients are outlined. 99