According to KeralaAgriculture.gov, Kerala soils are generally acidic, kaolintic and low in CEC. Kerala soils have a small water-holding capacity, and are high in phosphate. The soils in Kerala have eight different classifications: red loam, laterite coastal alluvium, riverine alluvium, Onattukara alluvium, brown hydrmorphic, saline hydromorphic, Kuttanad alluvium, black soil and forest loam.
According to KerlaAgriculture.gov, “Red loams of Kerala are localized in occurrence and are found mostly in the southern parts of Thiruvananthapuram district.” Found primarily in the foothills and small hillocks, red loam soil is red in color, making it easy to notice.
According to KeralaAgriculture.gov, the surface soil of laterite soil is reddish brown to yellowish red in color. The texture of laterite soil is mostly gravel.
Found on the West coast of Kerala, coastal alluvium has a sandy texture. According to KeralaAgriculture.gov, coastal alluvium developed from aquatic deposits.
Riverine soils are deep soils found along the banks and rivers of Kerala. According to KeralaAgriculture.gov, the surface texture ranges from sandy to clay.
According to KeralaAgriculture.gov, these soils comprise the Karunagapally, Karthikapally and Mavelikara taluks of Kollam and Alappuzha districts. The soil's texture is coarse.
This soil is mostly found in valleys and low-lying areas on the coastal strip. According to KeralaAgriculture.gov, characteristics of the brown hydromprphic soil are grey horizons, mottling streaks, hard pans, organic matter depositions, iron and manganese concretion.
According to KeralaAgriculture.gov, this soil is found on the coastal tracts of the districts of Ernakulam, Alappuzha, Trissur and Kannur. The variation of textures found in saline hydromprphic soils vary greatly. Pokkali and Kaipad soils are under this category.
According to KeralaAgriculutre.gov, this soil is found in an exceptional part of the world, and is submerged underwater for a large percentage of the year. This soil is waterlogged, and unlike any other soil. The Kayal soil, the Karappadam soil and the Kari soil are the three categories of this soil.
According to KeralaAgriculture.gov, this soil is restricted to the Chittoor taluk of Palakkad district. The black soil is an extension of the black cotton soil. This dark soil is found on level land, or land that slopes lightly.
According to KeralaAgriculture.gov, this soil is the product of crystalline rocks weathering in the forest. Found on the eastern part of Kerala, the color of forest loam soil is usually dark reddish brown to black.