According to the soil survey in the county, there are four soil types in Zhongjiang: paddy soil, fluvo-aquic soil, purple soil and yellow loam soil. It is divided into eight soil genera: gray-brown alluvial paddy soil, gray-brown alluvial soil, yellow-red purple mud paddy soil, yellow-red purple soil, brown-purple mud paddy soil, brown-purple soil, ginger-yellow mud paddy soil and ginger-yellow soil. ***38 native species.
1, taupe alluvial paddy soil, taupe alluvial soil, formed by modern alluvial deposits in Kaijiang. Mainly distributed along the Kaijiang River, covering an area of 265,438 0,000 mu, accounting for 65,438 0.9% of the total cultivated land area. Its composition is complex and the soil is fertile.
2. Yellow-red purple mud paddy soil and yellow-red purple soil. The soil parent material is yellow-red purple sand shale weathered in Lower Cretaceous, and the soil parent material is thinner than other purple soils. It is distributed in the vast areas north of Miao Feng, Jinji and Tongshan, covering an area of 682,000 mu, accounting for 6 1% of the total cultivated land area, and is the main soil in the county.
3. Brown purple muddy paddy soil and brown purple soil, whose parent material is weathered brown purple sand shale of Penglai Town Formation in Jurassic. It is distributed in the vast area south of the county, covering an area of 339,000 mu, accounting for 30.3% of the total cultivated land, ranking second in the county's soil.
4. Ginger clay paddy soil and ginger clay are yellow-brown calcareous nodule sandy clay and yellow-brown silty clay of Quaternary Pleistocene, which have been artificially cultivated and matured. It is mainly distributed in the valley area north of Taiping, stalagmites and Shuanglong, covering an area of 6,543,800 mu, accounting for 654.38+04.6% of the total cultivated land area.
China's soil has low organic matter content, low mineralization rate and low degree of high grade, and most of it contains calcium carbonate, which is slightly alkaline.