In general Bangladesh is a country of plain land. Only some parts of the north and north-east have Hilly areas. According to the soil characteristics Bangladesh is divided into 7 soil tracts. That are-
▬ Gangetic Alluvium
▬ Bramhaputra Alluvium
▬ Teesta Silt Tract
▬ Barind Tract
▬ Madhupur Tract
▬ Saline Tract
▬ Hill Tracts
Growing and production of crops can be different among this 7 Soil Tracts of Bangladesh.
Table of Contents
7 Soil Tracts of Bangladesh
Rajshahi, Pabna, Kushtia, Jessore, Khulna, Faridpur, Manikganj, and Barisal areas under this tract. The soil is Clay loam to sandy loam. It is calcareous and not acidic in nature and the soil pH is 7.0 to 8.5. This area covers about 10,600 SQ. miles. Mango, Litchi, Papaya, Banana, Jamun etc grow well here. All other Fruits also grow here.
Sylhet, Comilla, Noakhali and the plain land of Chittagong, except Dhaka, Narayanganj, Munshiganj and except Madhupur greater Mymensingh are under this tract. The soil is mainly loamy type. The soil pH is 5.5 to 6.8. An area of 16000 SQ m. mile is under this tract. In general, the soil is fertile. More or less all types of fruits are grown here.
Teesta silt Tract
The Northern part of Dinajpur, Thakurgaon, Rangpur, Eastern part of the river Karotoa of Bogra, Sirajganj are under this tract. The soil is weakly acidic. Soil pH is 6.0 to 6.65. More or less all fruits are grown here.
The Southern part of Dinajpur Sadar, the western part of Karotoa river of Bogra and part of Rajshahi, Nator, Naogaon, and Nawabgonj are under this tract. This is an old silted land. The soil is light brown to yellow color. This soil is somewhat iron rich and infertile. It is slightly acidic. The soil pH is 6.0 to 6.5. The soil of this region becomes deficient in nitrogen, phosphorus and calcium. The area under this tract is 5000 SQ. mile.
The Northern part of Dhaka, Eastern and southern part of Tangail i.e., commonly known as Madhupur forest are under this tract. This area is topographically uneven having small hilly views. The soil is iron rich, red and clay type. It is highly acidic having a pH of 5.5 to 6.0. The area of this tract is about 6000 SQ. mile. Quality jackfruit and pineapple are grown on the high land of this tract.
Except Khulna Sadar, and Barisal Sadar all other parts of these districts, islands of Noakhali and Chittagong, Patuakhali and other coastal areas are under this tract. This tract has mainly plain land and low land, small island type and is inundated by saline water. High tide and low tide are the main characteristics of this tract. The soil is saline and alkaline. Coconut and betel nut grow well in this tract. This tract covers an area of 6000 sq. mile.
- Hill Tracts
Chittagong hill tract including Rangamati, Khagrachhari, Bandarban, part of Chittagong, Some areas of Sylhet and the mountain heels of the Garo hill in Sherpur district fall under this tract. Some of these areas have red clay soil, fine sand and the mixture of two. Some stones and gravels are also found. Pineapple, Papaya, Jackfruit, Lemon, Guava, Mango and many other fruits are grown here. About 7000 SQ. miles constitutes this tract.