year 15, Issue 4 (In Press (Winter) 2025)
E.E.R. 2025, 15(4): 0-0 |
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Ghasedi-Yousefabad F, Rezaei H, Shahbazi F, Zarehaghi D. Using Digital Maps of Soil Organic Carbon and Clay for Evaluating Soil Structure Stability. E.E.R. 2025; 15 (4)
URL: http://magazine.hormozgan.ac.ir/article-1-893-en.html
URL: http://magazine.hormozgan.ac.ir/article-1-893-en.html
University of Tabriz , hossenrezaei@tabrizu.ac.ir
Abstract: (4 Views)
Aggregate stability is an index for evaluating soil quality and the main factor of land stability. Since measuring this index even in vast areas is difficult, using the estimated indices would facilitate studies. In the present research, which was conducted in northwestern Iran, the index, as mentioned above, was calculated using the ratio of soil organic carbon (SOC) to clay. To investigate this, the proposed index was primarily provided for the entire study area at five standardized depth intervals based on the GlobalSoilMap protocol. Additionally, the aggregate stability index (ASI) in the laboratory was also determined for 15 samples to conduct statistical analyses regarding a complete randomized factorial design at the same five standard depths. The results revealed that with depth increment, SOC decreased while clay and aggregate stability increased. The statistical analyses showed that there was no significant difference between directly measured ASI and the data extracted from digital maps. Therefore, the final digital map prepared by integrating SOC and clay demonstrates an acceptable result regarding soil aggregate stability at the studied standardized depths. Finally, it can be concluded that the usage of popular indices with a focus on the importance of contributed environmental covariates for mapping base characteristics responds to soil surveying demands. The present research revealed the crucial role of base maps for preparing key indices to improve the efficacy of soil resources management observations.
Received: 2025/05/25
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