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Effect of Soil Compaction on Pore Characteristics, Air Entry Potential, S Index and Plant Available Water Content of Some Soil Groups of India

Indian Agricultural Research Journals

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Title Effect of Soil Compaction on Pore Characteristics, Air Entry Potential, S Index and Plant Available Water Content of Some Soil Groups of India
 
Creator Jayashree Murmu
Arnab Kundu
Subhadip Saha
Soumyadeep Ghosh
Priyanka Ghatak
N.B. More
P.K. Bandyopadhyay
 
Subject Soil water retention
air entry value
pore geometry
bulk density
air capacity
 
Description Accurate quantification of soil micro-pores is important for understanding compression deformation, especially of fine-grained soils. The drying event of the average water retention of soils with varying compaction levels (bulk densities, viz. 1.2, 1.4, and 1.6 Mg m-3) of different soil groups, viz. new alluvial, black and red-laterite soils along with pore size distributions were measured. Results showed that the soil water retention curve (SWRCs) for all soil groups under study was strongly dependent on the compaction levels and soil textures. Van Genuchten coefficients were found smaller with the increase in bulk density (BD) across soil groups. Soil samples had a larger air entry value (AEV) and smaller specific water capacity when they had a higher BD. Black soil with higher clay content retained significantly 17% higher available water content (AWC) as compared with new alluvial and red-laterite soils. A higher BD of 1.6 Mg m-3 had the poorest retention capacity at the lowest suction but showed an inverse pattern at higher suction. The SWRC for compacted and non-compacted soils tend to converge in the high suction range. Red-laterite soils had a lower storage index, lower AEV, and higher air capacity as compared to new alluvial and black soils. Compaction did not influence soil air capacity (SAC) except in high clay-dominated black soils. Pore size distribution showed significant differences among density and soil groups and storage pores were significantly affected by compaction levels. Poor soil structural quality based on the S index averaging 0.028 was found in black soil with higher compaction levels. The impact of compaction on water retention, storage and flux of water, manipulated by mechanical operation is important in areas dealing with irrigation and drainage.
 
Publisher Indian Society of Soil Science
 
Date 2024-06-03
 
Type info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
 
Format application/pdf
 
Identifier https://epubs.icar.org.in/index.php/JISSS/article/view/152356
 
Source Journal of the Indian Society of Soil Science; Vol. 72 No. 1 (2024): Journal of the Indian Society of Soil Science; 66-76
0974-0228
0019-638X
 
Language eng
 
Relation https://epubs.icar.org.in/index.php/JISSS/article/view/152356/54710