STUDY OF DIFFERENT FORMS OF ZINC AND IRON AND THEIR RELATION WITH OTHER PROPERTIES OF SOILS UNDER RICE BASED CROPPING SYSTEM IN CHAMARAJANAGAR DISTRICT
| dc.contributor.advisor | SUBBARAYAPPA, C T | |
| dc.contributor.author | MAHENDRA KUMAR, M B | |
| dc.date.accessioned | 2017-06-30T05:03:48Z | |
| dc.date.available | 2017-06-30T05:03:48Z | |
| dc.date.issued | 2009-07-10 | |
| dc.description.abstract | An investigation was under taken to study the available zinc and iron status and distribution of different forms of zinc and iron in soils under paddy land use in Chamarajanagar district. Seventy five surface soil samples were collected from fifteen villages belonging to Chamarajanagar, Yelandur and Kollegal taluks of Chamarajanagar district. These samples were analyzed for available zinc and iron status and different forms of zinc and iron. The results revealed that available zinc and iron ranged from 0.69 to 2.96 and 6.09 to 32.14 mg kg-1, respectively. Distribution of different forms of zinc viz., water soluble, sorbed, easily reducible manganese bound, carbonate bound, organic matter bound and iron and aluminium oxides bound zinc ranged from 0.02 to 0.18, 0.64 to 5.31, 0.21 to 1.87, 0.11 to 3.39, 0.02 to 1.48 and 1.82 to11.68 mg kg-1 respectively and distribution of different forms of iron viz., exchangeable iron, organic matter bound, manganese oxides bound, amorphous iron oxides and crystalline iron oxides iron in these soils ranged from 2.68 to 12.12, 1.02 to 1.97, 14.7 to 92.3, 178 to 1020 and 167 to 1046 mg kg-1, respectively. Correlation studies indicated that available zinc recorded a significant and negative correlation with clay (r=-0.24*) and available iron recorded a significant and positive correlation with CaCO3 (r=0.54**) and negatively with pH of the soils (r=- 0.50**). All the zinc and iron fractions were correlated positively with each other except the easily reducible manganese bound zinc and organic matter bound iron, which recorded negative correlation with other fractions indicating the existence of a dynamic equilibrium between the zinc and iron fractions. | en_US |
| dc.identifier.other | TH-9356 | |
| dc.identifier.uri | http://krishikosh.egranth.ac.in/handle/1/5810023782 | |
| dc.language.iso | en | en_US |
| dc.pages | 121 | en_US |
| dc.publisher | UNIVERSITY OF AGRICULTURAL SCIENCES GKVK, BENGALURU | en_US |
| dc.sub | Agricultural Chemicals | en_US |
| dc.subject | null | en_US |
| dc.theme | STUDY OF DIFFERENT FORMS OF ZINC AND IRON | en_US |
| dc.these.type | M.Sc | en_US |
| dc.title | STUDY OF DIFFERENT FORMS OF ZINC AND IRON AND THEIR RELATION WITH OTHER PROPERTIES OF SOILS UNDER RICE BASED CROPPING SYSTEM IN CHAMARAJANAGAR DISTRICT | en_US |
| dc.type | Thesis | en_US |