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Spatial variability of clay minerals in a semi-arid region of Turkiye     
Yazarlar (2)
HİKMET GÜNAL
Dr. Öğr. Üyesi Nurullah ACİR Dr. Öğr. Üyesi Nurullah ACİR
Kırşehir Ahi Evran Üniversitesi, Türkiye
Devamını Göster
Özet
Clay minerals are the source of many chemical and physical properties that influence the provision of soil-based ecosystem services. This study aimed to identify the most significant soil characteristics contributing to the spatial variability of clay minerals in a semi-arid region of Turkiye. Additionally, the study assessed the predictive capabilities of Classification and Regression Tree (CART), Random Forest Regression (RF) and eXtreme Gradient Boosting Regression (XGBoost) in estimating soil clay mineral content. Smectite +vermiculite (SMVR) was the most abundant clay mineral in the study area, followed by illite and kaolinite. Hyperparameter tuning significantly improved model accuracy, with root mean square error (RMSE) reductions ranging from 2.53% to 97.3%. The machine learning algorithms demonstrated varying performances in spatial prediction accuracy. The RF model achieved the lowest RMSE (8.587%) and the highest R 2 values (0.796) for predicting SMVR. The XGBoost outperformed other models for kaolinite (RMSE: 4.814%, R 2 :0.713) and illite (RMSE:7.368%, R 2 :0.613). Exchangeable cations, particularly magnesium (Mg) and calcium (Ca), were identified as crucial factors influencing the spatial distribution of clay minerals. Among these, M concentration had the strongest influence on predicting both SMVR (38.1%) and illite (26.3%). Conversely, for kaolinite prediction, Ca concentration played the most significant role (38.7%), followed by Mg (19.93%). In conclusion, this study demonstrates the effectiveness of machine learning models, particularly XGBoost which achieved the lowest RMSE for all clay minerals investigated. These models offer a valuable tool for predicting clay mineral content in the Kazova Plain. The findings highlight the importance of parent material, weathering processes, and specific soil properties, such as exchangeable cations, in shaping clay mineral distribution. This knowledge not only contributes to a deeper understanding of soil formation in semi-arid environments but also practical applications. For instance, by predicting the abundance of SVMR, known for its high cation exchange capacity land managers can develop targeted strategies for optimizing fertilizer application in the Kazova Plain.
Anahtar Kelimeler
Clay mineral | Covariate | Modeling | Spatial distribution | Prediction | Artificial intelligence
Makale Türü Özgün Makale
Makale Alt Türü SSCI, AHCI, SCI, SCI-Exp dergilerinde yayımlanan tam makale
Dergi Adı Geoderma Regional
Dergi ISSN 2352-0094 Wos Dergi Scopus Dergi
Dergi Tarandığı Indeksler SCI-Expanded
Dergi Grubu Q2
Makale Dili İngilizce
Basım Tarihi 09-2024
Cilt No 38
Sayfalar 1 / 15
Doi Numarası 10.1016/j.geodrs.2024.e00820
Makale Linki https://doi.org/10.1016/j.geodrs.2024.e00820
BM Sürdürülebilir Kalkınma Amaçları
Atıf Sayıları
WoS 1
Google Scholar 2
Spatial variability of clay minerals in a semi-arid region of Turkiye

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