Fractal features of soil particle-size distributions and their relationships with soil properties in gravel-mulched fields
| Autor: | Wen-ju Zhao, Zhen Cui, Hong Ma |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Soil texture
Soil morphology Soil classification Soil science 04 agricultural and veterinary sciences 010501 environmental sciences Silt 01 natural sciences Fractal dimension Bulk density Salinity 040103 agronomy & agriculture 0401 agriculture forestry and fisheries General Earth and Planetary Sciences Particle size Geology 0105 earth and related environmental sciences General Environmental Science |
| Zdroj: | Arabian Journal of Geosciences. 10 |
| ISSN: | 1866-7538 1866-7511 |
| DOI: | 10.1007/s12517-017-3008-y |
| Popis: | Soil particle-size distribution (PSD) is an important index for soil classification because it has large influences on soil hydrological characteristics, salinity, fertility, erodibility, nutrient content, swelling/shrinking, and degradation. We present a case study of the fractal characteristics of soil PSD and its relationship with soil properties of gravel-mulched fields in an arid area of northwestern China using single-fractal calculation. Particle size was unimodally distributed within the narrow range of 20–100 μm, with silt as the most common component. Horizontally, silt content was the highest, followed by sand and clay contents. Vertically, clay content increased with depth, while there were no obvious change rules for both silt and sand contents. The volume fractal dimension (D) of PSD ranged from 2.4307 to 2.5260, increased with the content of fine particles but decreased with the content of coarse particles. D was correlated positively with soil-water content and salt content and negatively with bulk density. The saturated soil-water content was strongly correlated negatively with silt content (p |
| Databáze: | OpenAIRE |
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