HYDRO-PHYSICAL CHARACTERISTICS OF PADDY CULTIVATED SOILS OF JORHAT DISTRICT, ASSAM

摘要: The study on “Hydro-Physical Characteristics of soils of Jorhat District under Paddy cultivation” was carried out with the objective to generate information on soil water relationships in soils of Jorhat district under paddy cultivation. Soil samples were collected from Titabor, representing Humid Alluvial Flood Free Zone (HAFFZ), Baghchung, representing Humid Alluvial Flood Prone zone (HAFPZ) and Nimatighat, representing Char areas (CA) of Jorhat district. From each agro-ecological zones representative samples (both disturbed and core) were collected from two (2) locations and in each location from two land situations, viz., lowland and medium land and at each land situation from three depths viz., 0-15, 15-30 and 30-45 cm. Soil samples were analyzed for determination of soil physical and moisture characteristics parameters following standard procedures as outlined by Baruah and Barthakur (A Texbook of Soil Analysis). The soil moisture retention was increased as the clay content increased. Sand content of the soils had significant negative correlation with moisture retentions at different suctions viz. 0.3 bar (-0.77**), 0.5 bar (-0.707**), 1 bar (-0.716**), 5 bar (-0.554**) and 15 bar (-0.586**) suctions. The silt content had significant negative correlation (-0.529**) with moisture retention at 15 bar suction while the clay content had significant positive correlation with moisture retention at 0.3 bar (0.722**), 0.5 bar (0.707**), 1 bar (0.622**), 5 bar (0.582**) and 15 bar (0.771**) suctions, respectively. Available water content of Titabor, Baghchung and Nimatighat are 21.11 and 22.32 per cent, 21.51 and 23.42 per cent and 23.72 and 20.56 per cent for …