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פותח על ידי קלירמאש פתרונות בע"מ -
Aggregate Stability and Water Retention Near Saturation Characteristics as Affected by Soil Texture, Aggregate Size and Polyacrylamide Application
Year:
2016
Source of publication :
Land Degradation and Development
Authors :
לוי, גיא
;
.
Volume :
28
Co-Authors:
Mamedov, A.I., Institute of Soil Science and Agrochemistry, Institute of Botany, ANAS, Baku Azerbaijan, and Selcuk University Konya Turkey
Huang, C.-h., USDA-ARS National Soil Erosion Research Laboratory W. Lafayette, IN USA
Aliev, F.A., College of Humanities and Sciences Virginia Commonwealth University Richmond, VA USA, Faculty of Business Karabuk University Karabuk Turkey
Levy, G.J., Institute of Soil, Water and Environmental Sciences Agricultural Research Organization Bet Dagan Israel
Facilitators :
From page:
543
To page:
552
(
Total pages:
10
)
Abstract:
Understanding the effects of soil intrinsic properties and extrinsic conditions on aggregate stability is essential for the development of effective soil and water conservation practices. Our objective was to evaluate the combined role of soil texture, aggregate size and application of a stabilizing agent on aggregate and structure stability indices (composite structure index [SI], the α and n parameters of the VG model and the S-index) by employing the high energy (0-5·0Jkg-1) moisture characteristic (HEMC) method. We used aggregates of three sizes (0·25-0·5, 0·5-1·0 and 1·0-2·0mm) from four semi-arid soils treated with polyacrylamide (PAM). An increase in SI was associated with the increase in clay content, aggregate size and PAM application. The value of α increased with the increase in aggregate size and with PAM application but was not affected by soil texture. For each aggregate size, a unique exponential type relationship existed between SI and α. The value of n and the S-index tended, generally, to decrease with the increase in PAM application; however, an increase in aggregate size had an inconsistent effect on these two indices. The relationship between SI and n or the S-index could not be generalized. Our results suggest that (i) the effects of PAM on aggregate stability are not trivial, and its application as a soil conservation tool should consider field soil condition, and (ii) α, n and S-index cannot replace the SI as a solid measure for aggregate stability and soil structure firmness when assessing soil conservation practices. © 2016 John Wiley & Sons, Ltd.
Note:
Related Files :
Pore size distribution
Retention curve
soil conservation
soil structure
Stable aggregates
עוד תגיות
תוכן קשור
More details
DOI :
10.1002/ldr.2509
Article number:
0
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
22122
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:49
Scientific Publication
Aggregate Stability and Water Retention Near Saturation Characteristics as Affected by Soil Texture, Aggregate Size and Polyacrylamide Application
28
Mamedov, A.I., Institute of Soil Science and Agrochemistry, Institute of Botany, ANAS, Baku Azerbaijan, and Selcuk University Konya Turkey
Huang, C.-h., USDA-ARS National Soil Erosion Research Laboratory W. Lafayette, IN USA
Aliev, F.A., College of Humanities and Sciences Virginia Commonwealth University Richmond, VA USA, Faculty of Business Karabuk University Karabuk Turkey
Levy, G.J., Institute of Soil, Water and Environmental Sciences Agricultural Research Organization Bet Dagan Israel
Aggregate Stability and Water Retention Near Saturation Characteristics as Affected by Soil Texture, Aggregate Size and Polyacrylamide Application
Understanding the effects of soil intrinsic properties and extrinsic conditions on aggregate stability is essential for the development of effective soil and water conservation practices. Our objective was to evaluate the combined role of soil texture, aggregate size and application of a stabilizing agent on aggregate and structure stability indices (composite structure index [SI], the α and n parameters of the VG model and the S-index) by employing the high energy (0-5·0Jkg-1) moisture characteristic (HEMC) method. We used aggregates of three sizes (0·25-0·5, 0·5-1·0 and 1·0-2·0mm) from four semi-arid soils treated with polyacrylamide (PAM). An increase in SI was associated with the increase in clay content, aggregate size and PAM application. The value of α increased with the increase in aggregate size and with PAM application but was not affected by soil texture. For each aggregate size, a unique exponential type relationship existed between SI and α. The value of n and the S-index tended, generally, to decrease with the increase in PAM application; however, an increase in aggregate size had an inconsistent effect on these two indices. The relationship between SI and n or the S-index could not be generalized. Our results suggest that (i) the effects of PAM on aggregate stability are not trivial, and its application as a soil conservation tool should consider field soil condition, and (ii) α, n and S-index cannot replace the SI as a solid measure for aggregate stability and soil structure firmness when assessing soil conservation practices. © 2016 John Wiley & Sons, Ltd.
Scientific Publication
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