Prakash, N BCHAKPRAM, BIRENDRAJIT2017-07-042017-07-042014-07-10TH-10734http://krishikosh.egranth.ac.in/handle/1/5810024176An investigation was conducted to study the status of Zn and Fe content in rice genotypes and soils across different agro climatic zones (ACZ) of Karnataka and for Zn and Fe content and its uptake in rice following soil and / foliar application of their different sources under aerobic and wetland cultivation. The grain and straw Zn content across 64 rice genotypes ranged from 7.8 to 51.3 mg kg-1 and 16.6 to 284.0 mg kg-1, respectively. The grain and straw Fe content ranged from 9.6 to 88.8 mg kg-1 and 39.7 to 437.5 mg kg-1, respectively. In general, 36 per cent of soil samples collected representing eight ACZ were below the critical limit of 0.6 mg kg-1 Zn in soil. All the soil samples were above the critical limit of 4.5 mg kg-1 Fe in soil. The Zn and Fe content and its uptake by rice grain and straw in field experiment and grain, straw and root in PVC pipe experiment was higher in aerobic and wetland rice cultivation, respectively. Rasi genotype recorded higher Zn and Fe content and their uptake by grain, straw and root under both aerobic and wetland cultivation. Application of different sources of Zn and Fe to soil and foliar combination recorded higher content of Zn and Fe in grain and straw compared to soil application alone. Zn-EDTA and Fe-EDTA performed better than ZnSO4 and FeSO4 based on per unit of Zn/Fe application in achieving higher Zn and Fe content, respectively in grain and straw in all the experiments.ennullThesis