The paper investigates the morphological changes in the soils of the Mirzachol Oasis, focusing on the impacts of cultivation and irrigation over nearly 80 years. The study highlights significant alterations in the depth of the arable layer, soil color, the presence of gypsum, and the depth of carbonates. The research is based on repeated soil sections placed in areas where previous studies were conducted, allowing for a comparative analysis of morphological characteristics. Key findings include: 1. **Depth of the Arable Layer**: The depth of the arable layer increased over time due to the duration of irrigation. 2. **Soil Color**: Soil color changed from light gray in 1937 to gray in 1958, with the transition layer showing variations from grayish-brown to dark brown. 3. **Gypsum Layer**: The depth of the gypsum layer deepened over time, and the form of gypsum changed from separate crystals to small spots. 4. **Carbonates**: The depth and distinctness of the carbonate layer decreased, reflecting leaching effects. 5. **Gley Layer**: The gley layer became more pronounced and bluish in color, indicating the formation of reductive processes. 6. **Agrochemical Properties**: Irrigation and cotton planting increased biological activity, leading to higher levels of microorganisms and nutrients, particularly phosphorus. The study concludes that prolonged irrigation and cultivation have significantly altered the morphological characteristics and properties of the soils in the Mirzachol Oasis, affecting soil fertility and productivity.The paper investigates the morphological changes in the soils of the Mirzachol Oasis, focusing on the impacts of cultivation and irrigation over nearly 80 years. The study highlights significant alterations in the depth of the arable layer, soil color, the presence of gypsum, and the depth of carbonates. The research is based on repeated soil sections placed in areas where previous studies were conducted, allowing for a comparative analysis of morphological characteristics. Key findings include: 1. **Depth of the Arable Layer**: The depth of the arable layer increased over time due to the duration of irrigation. 2. **Soil Color**: Soil color changed from light gray in 1937 to gray in 1958, with the transition layer showing variations from grayish-brown to dark brown. 3. **Gypsum Layer**: The depth of the gypsum layer deepened over time, and the form of gypsum changed from separate crystals to small spots. 4. **Carbonates**: The depth and distinctness of the carbonate layer decreased, reflecting leaching effects. 5. **Gley Layer**: The gley layer became more pronounced and bluish in color, indicating the formation of reductive processes. 6. **Agrochemical Properties**: Irrigation and cotton planting increased biological activity, leading to higher levels of microorganisms and nutrients, particularly phosphorus. The study concludes that prolonged irrigation and cultivation have significantly altered the morphological characteristics and properties of the soils in the Mirzachol Oasis, affecting soil fertility and productivity.