Geostatistical models for land capability evaluation of Wadi Tag El-Wabar, Sohag, Egypt | ||
| Archives of Agriculture Sciences Journal | ||
| Article 8, Volume 3, Issue 2, August 2020, Pages 94-106 PDF (839.9 K) | ||
| Document Type: Research article | ||
| DOI: 10.21608/aasj.2020.110194 | ||
| Authors | ||
| M. A. El-Sayed* 1; M. A. Faragallah1; A. I. El-Desoky1; M. E. Fadl2 | ||
| 1Department of Soils and Water, Faculty of Agriculture, Al-Azhar University, Assiut, Egypt | ||
| 2Division of Scientific Training and Continuous Studies, National Authority for Remote Sensing and Space Sciences (NARSS), Cairo, Egypt | ||
| Abstract | ||
| This study aims to evaluate the land capability and assess geostatistical models for some soils of Wadi Tag El-Wabar located at south-western of Sohag governorate, Egypt. The investigated area is a part of the western desert; it is lies between latitudes 26◦ 3′ 50″ to 26◦18′ 00″ N and longitudes 31◦ 33′ 00″ to 31◦ 45′00″E. According to geomorphological units and recent digital image, thirty soil profiles were chosen to represent the studied area. The obtained results indicated that Wadi Tag El-Wabar soils are included four capability classes i.e. Grade 2 (Good), Grade 3 (Fair), Grade 4 (Poor) and Grade 5 (Non-agricultural) that represents 4.13, 30.07, 34.92 and 30.88%, respectively, of total area, by applying modified Storie rating. Geostatistical analysis for land capability rates were calculated through variance structure using eight semivariogram models (Circular, Pentaspherical, Exponential, Gaussian, Rational Quadratic, Hole Effect, K-Bessel and J-Bessel). All geostatistical models were fitted to the experimental semivariogram analysis using two kriged types (Kriging and Co-Kriging). These models were evaluated by five prediction errors i.e. mean, root mean square, average standard error, mean standardized and root mean square standardized. The results showed that Hole Effect and J-Bessel models were the best used models. A positive correlation (r2 = 0.7933) was recorded between the Hole Effect and J-Bessel semivariogram models. | ||
| Keywords | ||
| geostatistical analysis; land capability; modeling; Wadi Tag El-Wabar | ||
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