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- W2105205251 abstract "The present research study was conducted with a prime objective to investigate the effect of different manures on transformations of Zn and Fe in rice grown on light textured soils. To achieve these objectives, laboratory studies were conducted on the soil samples collected during Kharif 2009 season from an experiment on rice in the research farm of Department of Soil Science, PAU, Ludhiana. For this ten different type of manures viz. rice straw (RS), wheat straw (WS), maize straw (MW), cowpeas green manure (CGM), Dhaincha green manure (DGM), farm yard manure (FYM), poultry manure (PM), rice straw manure (RSM), vermi compost (VC) and biogas slurry (BGS), which were used to ameliorate Zn and Fe deficiency, helped in their transformation in the soil when these manures were incorporated before rice transplantation. The biomasses of these manures were added to soil on dry weight basis. Three soil samplings were conducted at an interval of 45 days, starting from first day of rice transplantation. Soil samples were collected and analyzed for basic soil parameters using standard procedures. These soil samples were also subjected to estimation of DTPA and total Zn and Fe fractions using atomic absorption spectrometer (Varian AAS- FS 240 Model).The results of our study reported that DTPA-Zn level decreased during different sampling times under all the manures. There was drastic reduction of DTPA-Zn during third sampling with the application of VC but it remained above the critical level of Zn. The rice crop did not show any Zn deficiency as the DTPA-Zn in all the treatments was above its critical limit (0.6 mg kg -1 ). The higher content of DTPA-Fe was reported by PM (52.1mg kg -1 ) followed by DGM (41.0 mg kg -1 ) and VC (38.0 mg kg -1 ). At the time of maximum tillering stage, Fe deficiency was reported during fourth week of paddy transplantation. With manures, the highest level of total Zn was reported by CGM (39.7 mg kg -1 ) which was further followed by DGM (34.8 mg kg -1 ) and BGS (32.8 mg kg -1 ). On the other hand higher content of total Fe was reported by PM (10017 mg kg -1 ) followed by CGM (9652 mg kg -1 ) and DGM (9303 mg kg -1 ). The decomposition of manures helped in release of more DTPA-Fe in the soil which was transformed to unavailable fractions under oxidized environment. This buildup of Fe was progressed nearly two times over its 1 st sampling with advancement of time of manure decomposition. Application of FeSO 4 in the soil failed to remove Fe-chlorosis in the rice plants. Our results concluded that application of manures before rice transplantation is the good practice and suitable mode to remove Fe-chlorosis in the rice plants." @default.
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- W2105205251 date "2013-01-01" @default.
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- W2105205251 title "DIFFERENTIAL RESPONSE OF MANURES IN TRANSFORMATION OF DTPA AND TOTAL ZINC AND IRON IN RICE TRANSPLANTED ON LIGHT TEXTURED SOILS OF PUNJAB" @default.
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