Kirkuk University Journal for Agricultural Sciences (KUJAS)

Study of Some Morphological and Pedological Properties of the Soils in Dawodi Plain , Tooz Khurmato, Salah Al-Din

https://doi.org/10.58928/ku25.16423
Volume 16, Issue 4 - Issue Serial Number 4
Autumn 2025
Page 210-222
Kirkuk University Journal for Agricultural Sciences (KUJAS)

Document Type : Research Paper

Authors

goran Safar Mohammed 1
Dalshad Rasol Azeez 2
Salah J. Amin 3

1 University of Kirkuk - College of Agriculture كوران صفر محمد

2 University of Kirkuk - College of Agriculture

3 Department of Soil and Water Resources, College of Agriculture, University of Kirkuk, Kirkuk, IRAQ.

Abstract
The study area (Dawodi Plain) is located in the northeastern part of Iraq, Salah Al-Din Governorate. It covers a total area of 70,622 hectares, situated between longitudes (44° 55' 39" – 44° 33' 27") E and latitudes (34° 48' 48" – 35° 08' 30") N. The region experiences a climate characterized by rainy winters and hot summers, with an annual rainfall of less than 383 mm and an average annual temperature of 22°C. The soil moisture regime is classified as Aridic, while the soil temperature regime is Hyper thermic. The area has a plain morphology with a gentle slope of 2-5%.Five sites were selected for soil profile sampling, where one profile was excavated at each site and divided into its respective horizons. A total of 25 soil samples were collected from the profiles for physical, chemical, and morphological analyses. The study revealed that the pH values of the studied profiles ranged from slightly alkaline to neutral. The CK3 horizon of Profile 2 recorded the highest pH value (8.1), while the Ap horizon of Profile 1 had the lowest pH value (7.1). Additionally, pH values were generally higher in surface horizons compared to subsurface horizons. Most of the studied profiles exhibited low salt content, except for the Ap horizon of Profile 1. Calcium carbonate content was found to increase in subsurface layers. Gypsum content varied in Profiles 1, 2, and 5, while no gypsum was detected in Profiles 3 and 4. All studied profiles featured a surface diagnostic horizon of the Ochric type and a subsurface diagnostic horizon of the Calcic type. According to the USDA soil taxonomy, the soils were classified as Typic Haplocalcids, while under the WRB system, they were classified as Haplic Hypercalcic Calcisols.

Keywords

Douadi plain
diagnostic horizons
Soil Taxonomy
Calcic horizon
Subjects
  • Hammad, A. M., & Rasheed, A. A. (2023). Studying the types of land Capability units and preparing the Capability map for some series of the North Tikrit Agricul-tural Project in Salah al-Din Governorate. Journal for Agricultural Sciences, 14(4), 72-82. ‏
  • Aziz, S. A. (2025) Influence of climatic variation on soil physiochemical properties and agricultural suitability in northeast of Sulaymani, Iraq. Sciences, 16(1), 9-22. ‏
  • Al–Rawi, J. K. S., & Al-jawwadi, T. A. H. T. (2013). Using Some of the Remote Sensing Methods in Describing the Soil Morphological Features. Kirkuk University Journal for Agricultural Sciences (KUJAS), 4(2). ‏
  • Amin, I. M. (2010). Inserting some morphological soil characteristics to modifying storie's index for rating the agricultural value of soils. Journal of Kirkuk University for Agricultural Sciences, 1(2). ‏
  • Sofo, A., Zanella, A., & Ponge, J. F. (2022). Soil quality and fertility in sustainable agriculture, with a contribution to the biological classification of agricultural soils. Soil Use and Management, 38(2), 1085-1112. ‏
  • Peng, X., & Dai, Q. (2022). Drivers of soil erosion and subsurface loss by soil leakage during karst rocky desertification in SW China. International Soil and Water Conservation Research, 10(2), 217-227. ‏
  • Younus, S. S., & Al-Naser, Y. H. (2022). Morphological and Physicochemical Characteristics of Agricultural Soils in Zummar Region, Northwest Iraq. Sci Res. J. Agr. Lf. Sci, 2(6), 6-11. ‏
  • Abdulridha, A. N., & Essa, S. K. (2023). Use of organic matter and sand in improving properties of some soils of holy Karbala governorate affected by phenomenon of cracking. Iraqi Journal of Agricultural Sciences, 54(1), 268-281. ‏
  • Buringh, P. (1960). Soils and soil conditions in Iraq. ‏
  • Khoshnaw, M. R., & Esmail, A. O. (2020). Comparison between organic matter content of main soil orders in Kurdistan region using two different methods. Iraqi journal of agricultural sciences, 51, 1-8. ‏
  • Page, A. L., Miller, R. H., & Keeny, D. R. (1982). Methods of Soil Analysis. Part (2) 2nd (ed). Agronomy 9. Amer. Soc. Agron. Madison Wisconsin. Papanicolaou, EP (1976). Determination of cation. Exchange capacity of calcareous soils and their percent base saturation. soil Sci, 121, 67-71. ‏
  • Richards, L. A. (Ed.). (1954). Diagnosis and improvement of saline and alkali soils (No. 60). US Government Printing Office. ‏
  • Hesse, P. R., & Hesse, P. R. (1971). A textbook of soil chemical analysis. ‏
  • Black, C.A. (1965). Method of soil analysis. Am.Soc. of Agro. No. 9, Part 1 and 2
  • Gee, G. W., & Bauder, J. W. (1986). Particle‐size analysis. Methods of soil analysis: Part 1 Physical and mineralogical methods, 5, 383-411. ‏
  • Hourani, M. (2018). Mapping Some Physical and Chemical Properties of Soils Taken from the Al-Sha'irat Region. Master's thesis, Al-Baath University, Faculty of Agriculture, Syria.
  • Al-Husseini, A. K. A. (2010). Inheritance of yield potential traits in some soils of northern Iraq [Unpublished doctoral dissertation]. Department of Soil and Water Resources, College of Agriculture, University of Baghdad.
  • Nouri, N. I. (2023). Assessment of water erosion risk in the Shawin Basin, Kirkuk Governorate using geospatial techniques [Master’s thesis, University of Kirkuk]. Council of the College of Agriculture.

Rashidi, F., & Sharifian, S. (2022). A comparative analysis of three multi-criteria decision-making methods for land suitability assessment. Environmental Monitoring and Assessment, 194(9), 657.

 

 

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