EVALUATION OF FRACTAL DIMENSIONS FOR ANALYSIS OF AGGREGATE STABILITY

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SEPASKHAH ALI REZA; MOUSAVI SEYED ALI; BOERSMA L.

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Journal: Iran Agricultural Research Year:2000 | Volume:19 | Issue:2 Page(s): 99-114

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Title

EVALUATION OF FRACTAL DIMENSIONS FOR ANALYSIS OF AGGREGATE STABILITY

Author(s)

SEPASKHAH ALI REZA | | MOUSAVI SEYED ALI | BOERSMA L. | Issue Writer Certificate

Keywords

PETROLEUM MULCLRESQ3

SOIL CONDITIONSQ3

Abstract

Fractal theory is increasingly being used to characterize aggregate size distributions of soils. Our purpose was to compare indirect number-size fractal dimension (Dn, a fitting parameter), mass-size fractal dimension (Dm), and mean weight diameter (MWD), as measures of soil aggregate stability. Samples of a calcareous silty clay soil (Calcixerollic Xerochrept) was treated with cationic, anionic and clay emulsion petroleum mulches and "krilium merloam" (krilium) which is a copolymer of vinyl acetate and maleic acid. Application amounts were 0, 0.5, 1.0 and 1.5 g kg-1 on dry mass basis. Assuming cubic aggregates of constant dry density, Dn was estimated from cumulative size-frequency distribution data plotted on a log log scale and Dm was estimated from cumulative mass-size distribution data in the same manner. Dn and Dm decreased with increasing amount of mulch applications indicating an increase in aggregate stability as a result of the addition of the mulch. The increase was most pronounced for the krilium, indicating that this chemical was most effective for increasing aggregate stability. Application of MWD, Dn and Dmmay lead to different conclusion’s in the assessment of the effectiveness of the various chemicals for improving soil aggregate stability. For less effective chemicals (petroleum mulches) Dn values (a fitting parameter) were a better indicator of differences in fragment distributions. while for more effective chemicals (Le., krilium) MWD showed the differences in fragment distribution better than Dn and Dm.A~e1ition of krilium at amounts greater than 0.5 g kg-1 might have resulted in aggregates with complete fragmentation properties, while the aggregates of other treatments did not show this behavior. The Dn (a fitting parameter) may be used to describe the fractal behavior of the soil fragments with MWD greater than 0.67 and 1.17 mm for petroleum mulch and krilium applications, respectively. However mass-size fractal dimensions failed to show the effects of various rates of petroleum, mulches on the fragment size distributions.

Cites

EFFECTS OF FLOODING AND FIRE ON AGGREGATE STABILITY: A CASE STUDY IN THE SOILS OF LAKAN NURSERY IN GUILAN PROVINCE

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APA: Copy

SEPASKHAH, ALI REZA, MOUSAVI, SEYED ALI, & BOERSMA, L.. (2000). EVALUATION OF FRACTAL DIMENSIONS FOR ANALYSIS OF AGGREGATE STABILITY. IRAN AGRICULTURAL RESEARCH, 19(2), 99-114. SID. https://sid.ir/paper/16148/en

Vancouver: Copy

SEPASKHAH ALI REZA, MOUSAVI SEYED ALI, BOERSMA L.. EVALUATION OF FRACTAL DIMENSIONS FOR ANALYSIS OF AGGREGATE STABILITY. IRAN AGRICULTURAL RESEARCH[Internet]. 2000;19(2):99-114. Available from: https://sid.ir/paper/16148/en

IEEE: Copy

ALI REZA SEPASKHAH, SEYED ALI MOUSAVI, and L. BOERSMA, “EVALUATION OF FRACTAL DIMENSIONS FOR ANALYSIS OF AGGREGATE STABILITY,” IRAN AGRICULTURAL RESEARCH, vol. 19, no. 2, pp. 99–114, 2000, [Online]. Available: https://sid.ir/paper/16148/en

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