Impact of Sewage Sludge Application on Temporal Variation of Plasticity Limits and Aggregate Stability in a Calcareous Soil

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Alavi Fatemeh sadat; sameni abdolmajid; MOUSAVI SEYED ALI AKBAR

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Journal: Iranian Journal of Soil Research Year:2016 | Volume:30 | Issue:3 Page(s): 343-356

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Title

Impact of Sewage Sludge Application on Temporal Variation of Plasticity Limits and Aggregate Stability in a Calcareous Soil

Author(s)

Alavi Fatemeh sadat | sameni abdolmajid | MOUSAVI SEYED ALI AKBAR | Issue Writer Certificate

Keywords

mean weight diameterQ1

Geometric mean diameterQ2

Atterberg limitsQ2

Organic carbonQ1

Upper and lower plastic limitQ2

Plasticity indexQ2

Abstract

Low organic matter in arid and semi-arid soils results in decreasing physical quality and increasing runoff and soil erosion. Application of organic compounds (sewage sludge) in these regions can improve soil physical and chemical properties. In the present research, effect of different levels of sewage sludge (0, 30 and 60 ton ha-1) on Organic carbon, aggregate stability (mean weight diameter, MWD and Geometric mean diameter, GMD), and plasticity limits (upper plastic limit, UPL, lower plastic limit, LPL, and Plasticity index, PI) was studied over three time periods of 30, 60, and 120 days after application of sewage sludge. Soil Organic carbon increased with increasing sewage sludge, but decreased significantly over time as compared to that of the control. Aggregate stability increased with sewage sludge application. Aggregate stability decreased 60 days after experiment as compared to that of 30 days, whereas, there was no significant difference between the aggregate stability at 120 and 30 days after the experiment. Upper plastic limit increased with increasing sewage sludge application. This criterion increased over time and decreased after that; whereas, LPL increased with sewage sludge application and did not vary over time. Sewage sludge did not affect PI significantly, while PI increased over time and then decreased. In general, results indicated that application of sewage sludge could increase soil organic matter and water holding capacity. Furthermore, with application of sewage sludge, soils can be tilled at higher moisture contents without any probable compaction. Of course, in addition to considering the positive effects of sewage sludge in improving soil physical properties, economical issues and the probable adverse effects of excessive application of sewage sludge and environmental risks should also be considered.

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APA: Copy

Alavi, Fatemeh sadat, sameni, abdolmajid, & MOUSAVI, SEYED ALI AKBAR. (2016). Impact of Sewage Sludge Application on Temporal Variation of Plasticity Limits and Aggregate Stability in a Calcareous Soil. IRANIAN JOURNAL OF SOIL RESEARCH (FORMERLY SOIL AND WATER SCIENCES), 30(3 ), 343-356. SID. https://sid.ir/paper/159031/en

Vancouver: Copy

Alavi Fatemeh sadat, sameni abdolmajid, MOUSAVI SEYED ALI AKBAR. Impact of Sewage Sludge Application on Temporal Variation of Plasticity Limits and Aggregate Stability in a Calcareous Soil. IRANIAN JOURNAL OF SOIL RESEARCH (FORMERLY SOIL AND WATER SCIENCES)[Internet]. 2016;30(3 ):343-356. Available from: https://sid.ir/paper/159031/en

IEEE: Copy

Fatemeh sadat Alavi, abdolmajid sameni, and SEYED ALI AKBAR MOUSAVI, “Impact of Sewage Sludge Application on Temporal Variation of Plasticity Limits and Aggregate Stability in a Calcareous Soil,” IRANIAN JOURNAL OF SOIL RESEARCH (FORMERLY SOIL AND WATER SCIENCES), vol. 30, no. 3 , pp. 343–356, 2016, [Online]. Available: https://sid.ir/paper/159031/en

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