Characterization and Classification of Paddy and Associated Non Paddy Soils of Upper Brahmaputra Valley of Assam

Zenesia A Phillips,Dr S Dutta,Dr R.M Karmakar

doi:10.34257/gjsfrdvol20is3pg1

Abstract

An investigation was done to characterize and classify paddy and associated nonpaddy soils of the Upper Brahmaputra Valley of Assam. In this study,three districts viz., Sivasagar, Jorhat, and Golaghat in the Brahmaputra valley of Assam were selected. These districts are located in the Upper Brahmaputra Valley Zone (UBV) of Assam. Combined, they cover an approximate area of 9021 sq. Km or about 55.7 per cent of UBV. Six soil profiles, three each from mono-cropped paddy and, associated nonpaddy areas were collected from the districts mentioned. These samples were collected Horizon wise from each soil profile. Each soil sample was dried and passed through a 2 mm sieve. The samples from each pedon were evaluated for morphological and Physicochemical characteristics,based on morphological and physicochemical properties. Thesoils were classified as Aquic Dystric Eutrudepts (P1), Dystric Eutrudepts (NP1, NP2, P3, NP3) and Dystric Fluventic Eutrudepts (P2).

Highlights

These districts are located in the Upper Brahmaputra Valley Zone (UBV) of Assam
Chroma of 2 or less observed in subsurface horizons of P1, NP1 and, P3 indicate aquic conditions and the process of gleization operating in these soils
Fine, distinct to common, medium, prominent 41 mottles with colors of 7.5YR 6/8 to 7.5YR 8/8 had been observed in some subsurface horizons of the studied soils

Summary

Introduction

These districts are located in the Upper Brahmaputra Valley Zone (UBV) of Assam. Combined, they cover an approximate area of 9021 sq. Typical paddy growing soils of Assam have paddy and, associated nonpaddy areas were collected from characteristic plow-pans with high bulk densities (Das, Global Journal of Science Frontier Research ( D) Volume XX Issue III Version I the districts mentioned. Sand in the subsurface horizons. Dutta (2001) reported that the texture of the paddy and non-paddy soils varied from sandy clay loam to clay and from sandy loam to clay loam respectively

Methods

Results

Conclusion