Characterization of Rice Soils of Red-Yellow - Gray Catenary Soil Association Of Chotanagpur With Special Emphasis On The Translocation Of Aluminum, Iron And Maganese
| dc.contributor.advisor | B.S.Mathur | |
| dc.contributor.author | Nand Kishore Rana | |
| dc.date.accessioned | 2024-06-22T14:17:25Z | |
| dc.date.available | 2024-06-22T14:17:25Z | |
| dc.date.issued | 1990 | |
| dc.description.abstract | Eleven soil profiles have been studied in four toposequences, two each in Ranchi and Hazaribagh districts with a view to characterise the soils on mid-up slope, mid slope and lower slope and to study the mobility of aluminium, iron and manganese down the profile and catena. Terracing has resulted more vertical than horizontal movement of water as reflected by soil properties. The lowlands represent the old beds of drainage channels. The soils on the upper slope are yellowish brown to grayish brown, sandy loan becoming sandy clay loan in lower horizons, granular in the ploughed layer but becoming strong blocky down the profile. The mottlings and concretions become more prominent with depth. soils have bulk density around 1.45 g/ac which increases with depth. While the soil moisture at 1/3 and 15 atmospheric tensions increase with depth the availability of water decreases with depth and slope. These soils have COLE values around 0.033 which increase with depth even upto 0.075. The soils have cation exchange capacity around 10.0 mo/100 g (mean) which increases with depth even upto about 20.0 ma/100 g. The soils are low to medium in organic carbon which decreases with depth. The soils are acidic but acidity decreases considerably with depth. The soils on mid-slope are olive brown, sandy loam becoming clay loam in lower horizons, granular but becoming blocky with depth and have mottles and concretions which increase with depth. In comparison to medium uplands, the soils have higher COLE values and bulk density. The soils have CEC value around 11.0 me/100 g (mean) which also increases with depth upto about 23.0 me/100 g. The soils are madium in organic carbon which shows a decrease with depth and are less acidic than upland soils and the acidity decreases considerably with depth. The soils on lower slope are gray coloured, light to heavy textured and blocky having higher bulk density but COLE values range between 0.02 to 0.05 and increase with depth. The soils have lower values of cation exchange capacity (around 13.41 me/100 g) and organic carbon and are slightly neutral in reaction. Base saturation increases down the slope as well as down the profile. Total calcium, in general, decreases with depth and catena with subsequent increase in magnesium, sodium and potassium. Topography and drainage have affected the mobiliza tion and immobilization of aluminium, iron and manganese in the catenary soils. Exchangeable and/or available forms of Al, Fe and in are accumulated in the surface soils, whereas, total amount of the elements are concentrated in subsoils at certain depth. The Red-Yellow-Gray soils of Ranchi and Hazaribagh districts in the catenary sequence have been classified as per soil Taxonomy under Alfisols, Inceptisols and Entisols. | |
| dc.identifier.uri | https://krishikosh.egranth.ac.in/handle/1/5810210772 | |
| dc.language.iso | English | |
| dc.pages | 237 | |
| dc.publisher | Birsa Agricultural University, Ranchi | |
| dc.sub | Soil Science and Agriculture Chemistry | |
| dc.theme | Characterization of Rice Soils of Red-Yellow - Gray Catenary Soil Association Of Chotanagpur With Special Emphasis On The Translocation Of Aluminum, Iron And Maganese | |
| dc.these.type | Ph.D | |
| dc.title | Characterization of Rice Soils of Red-Yellow - Gray Catenary Soil Association Of Chotanagpur With Special Emphasis On The Translocation Of Aluminum, Iron And Maganese | |
| dc.type | Thesis |