EVALUATION OF THE IMPACT OF MULCHES IN RAINFED FARMS ON SOIL CONSERVATION IN THE ARID AND SEMI-ARID REGION IN SOUTH OF IRAN

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ADELPOUR A.A.; SOUFI MAJID; BEHNIA A.A.K.

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Journal: Journal of Agricultural Sciences and Natural Resources Year:2006 | Volume:13 | Issue:2 Page(s): 50-57

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Title

EVALUATION OF THE IMPACT OF MULCHES IN RAINFED FARMS ON SOIL CONSERVATION IN THE ARID AND SEMI-ARID REGION IN SOUTH OF IRAN

Author(s)

ADELPOUR A.A. | SOUFI MAJID | BEHNIA A.A.K. | Issue Writer Certificate

Keywords

RAIN FED FARM MULCHESQ3

SOIL RESISTANCEQ3

SHEAR STRESSQ2

SOIL ERODIBILITY FACTORQ3

Abstract

Stubble mulches on the rainfed farms will increase the shear strength of topsoil against overland flow. The evaluation of flow resistance of crop residues in the arid and semi arid rainfed farms in south of Iran is very important due to its soil texture and rainfall regime. Especially in the spring and summer that there are some floods and no vegetation cover on the ground. An open hydraulic flume with 15m length, O.3m width and 0.5m depth was used to simulate concentrated overland flow on the native rangeland around Lamerd City. Four treatments including rainfed farm mulches, poor pasture (vegetation density less than 20%), moderate (vegetation density between 20 and 40%) and good pasture (vegetation density higher than 40%) were examined. For each treatment, four to five discharges from low to high were used and hydraulic parameters and sediment were measured directly. Results of this study show that the critical SHEAR STRESSes for erosion initiation were 22.1, 20.54, 38.61 and 39.68 dyne/cm2 for RAIN FED FARM MULCHES, poor, moderate and good ranges respectively and the threshold of sheet erosion of crops residuals is higher than poor pasture and less than moderate. On the other hand, calculated SOIL ERODIBILITY FACTORs are 0.37, 0.56, 0.51 and 0.32gr./m2-sec, respectively that show flow resistance of rainfed farm mulches is between moderate and good pastures. Finally the critical flow rates were 1.5, 0.75, 2.2 and 2.54 lit/sec for rain fed rain mulches, poor, moderate and good ranges, respectively. It implies that RAIN FED FARM MULCHES can decrease flood damages.

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APA: Copy

ADELPOUR, A.A., SOUFI, MAJID, & BEHNIA, A.A.K.. (2006). EVALUATION OF THE IMPACT OF MULCHES IN RAINFED FARMS ON SOIL CONSERVATION IN THE ARID AND SEMI-ARID REGION IN SOUTH OF IRAN. JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES, 13(2), 50-57. SID. https://sid.ir/paper/9417/en

Vancouver: Copy

ADELPOUR A.A., SOUFI MAJID, BEHNIA A.A.K.. EVALUATION OF THE IMPACT OF MULCHES IN RAINFED FARMS ON SOIL CONSERVATION IN THE ARID AND SEMI-ARID REGION IN SOUTH OF IRAN. JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES[Internet]. 2006;13(2):50-57. Available from: https://sid.ir/paper/9417/en

IEEE: Copy

A.A. ADELPOUR, MAJID SOUFI, and A.A.K. BEHNIA, “EVALUATION OF THE IMPACT OF MULCHES IN RAINFED FARMS ON SOIL CONSERVATION IN THE ARID AND SEMI-ARID REGION IN SOUTH OF IRAN,” JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES, vol. 13, no. 2, pp. 50–57, 2006, [Online]. Available: https://sid.ir/paper/9417/en

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