The Effect of Field Capacity in Determination and Evaluation of the Soil Physical Quality Indices

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MESKINI VISHKAEE FATEMEH; MIRKHANI RASOUL

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Journal: Iranian Journal of Soil and Water Research Year:2019 | Volume:50 | Issue:4 Page(s): 836-846

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Title

The Effect of Field Capacity in Determination and Evaluation of the Soil Physical Quality Indices

Author(s)

MESKINI VISHKAEE FATEMEH | MIRKHANI RASOUL | Issue Writer Certificate

Keywords

Air capacity indexQ1

Dexter's S indexQ1

Plant available waterQ1

Relative field capacity indexQ1

Abstract

Estimating the soil physical indices requires determination of soil moisture content at field capacity (FC). Therefore, the aim of this study was to evaluate the effect of various soil suctions according to field capacity on different soil physical quality indices and subsequently to evaluate the soil physical quality based on the calculated indices. In this study, 35 soil samples from agricultural lands of Alborz province were used to calculate Dexter's S, air capacity, Plant available water and relative field capacity indices. The results showed that only 20 % of the soil samples were in weak soil physical quality groups (S < 0. 035) and the rest of soil samples had a good or better soil physical quality (80 %) on the basis of Dexter's S index. However, the results of other indices showed by assuming a FC moisture content at soil suction of 100, 330 cm and calculated suction based on the negligible drainage rate concept, 12, 44 and 70% of soil samples, respectively had a good physical quality in terms of soil aeration, water availability and microbial activity. There was no significant difference between the average FC at equivalent soil suction of 330 cm and the proposed approach based on the negligible drainage rate. Hence, the soil physical indices based on FC at soil suction of 330 cm can be used to evaluate the soil physical quality of the studied soils. Moreover, the results showed that despite of good ability of S index, use of other soil physical quality indices leads to a more comprehensive assessment of soil physical limitation on crop growth. However, determination of the soil quality indices requires an accurate estimation of soil moisture content at the field capacity.

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APA: Copy

MESKINI VISHKAEE, FATEMEH, & MIRKHANI, RASOUL. (2019). The Effect of Field Capacity in Determination and Evaluation of the Soil Physical Quality Indices. IRANIAN JOURNAL OF SOIL AND WATER RESEARCH, 50(4 ), 836-846. SID. https://sid.ir/paper/225822/en

Vancouver: Copy

MESKINI VISHKAEE FATEMEH, MIRKHANI RASOUL. The Effect of Field Capacity in Determination and Evaluation of the Soil Physical Quality Indices. IRANIAN JOURNAL OF SOIL AND WATER RESEARCH[Internet]. 2019;50(4 ):836-846. Available from: https://sid.ir/paper/225822/en

IEEE: Copy

FATEMEH MESKINI VISHKAEE, and RASOUL MIRKHANI, “The Effect of Field Capacity in Determination and Evaluation of the Soil Physical Quality Indices,” IRANIAN JOURNAL OF SOIL AND WATER RESEARCH, vol. 50, no. 4 , pp. 836–846, 2019, [Online]. Available: https://sid.ir/paper/225822/en

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