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Buildup of soil organic carbon and stable aggregates under conservation tillage in loess dryland soil
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January 1, 2015
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Muhammad Sharif, Shahzada Sohail Ijaz, Safdar Ali, Muhammad Ansar, Asma Hassan
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J. Bio. Env. Sci.6( 1), 446-453, January 2015
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The identification of sensitive soil organic carbon (SOC) fractions can be crucial for an understanding of SOC dynamics and stabilization in soil. This study was conducted during 2012-14 in fallow-wheat cropping system at loess dryland Pothwar, Pakistan to assess the effect of minimum tillage (MT), reduced tillage (RT), zero tillage (ZT) and conventional tillage (CT), with residue retuned (R+) and removed (R–) on SOC fractions and aggregate stability. The results showed that the ZT with residue returned provided the highest amount of SOC (7.80g kg-1), microbial biomass carbon (MBC, 473 µg kg-1), particulate organic carbon (POC, 2.27 g kg-1) and water stable aggregates (WSA, 36%). On the other hand, CT with residue removed gave the least amounts of SOC (5.35 g kg-1), MBC (130 µg kg-1), POC (1.25 g kg-1) and aggregate stability (24%). The trend among tillage treatments was ZT > RT > MT > CT for studied parameters. Among residue treatments, residue return (+R) had higher SOC content and aggregate stability than residue removed (-R). These results clearly demonstrate that ZT and RT with residue returned are potential alternatives to conventional tillage for enhancing soil organic carbon and structural stability in loess dryland soils.
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Muhammad Sharif, Shahzada Sohail Ijaz, Safdar Ali, Muhammad Ansar, Asma Hassan (2015), Buildup of soil organic carbon and stable aggregates under conservation tillage in loess dryland soil; JBES, V6, N1, January, P446-453
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Natural Sciences (INNSPUB)
http://innspub.net
This article is published under the terms of the Creative
Commons Attribution Liscense 4.0
Buildup of soil organic carbon and stable aggregates under conservation tillage in loess dryland soil
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