A field experiment was carried out to formulate the fertilizer recommendation for Brinjal crop in Inceptisol of Chhattisgarh during Rabi season 2005-06. The objectives were to find out the nutritional requirement of the crop, The experimental field was divided in to three fertilizer gradient strips (L0, L1 and L2), which was already created during previous Kharif season, 2005 by adding different graded dose of fertilizer N, P and K with maize as exhaust crop. Thirty-six treatments considered of 3 3 factorial combinations of fertilizer N, P and FYM were superimposed over each fertility strip (L0, L1 and L2). Mukta Kesi variety of Brinjal was taken as the test crop. The crop response to added nutrients and various regression analysis were performed after the crop harvest. Linear Response Plateau (LRP) and Quadratic Response Plateau (QRP) models were used to relate yield with soil test and fertilizer dose and resulted significantly high R 2 values suggesting their suitability. Brinjal crop requried 0.31 Kg N, 0.037 Kg P and 0.57 Kg K to produce one quintal of Brinjal fruit yield. The LRP model considered constant nutrient use efficiencies for each level of soil test and fertilizer doses, However QRP model estimated variable soil and fertilizer efficiencies. The special feature of these models was the consideration of yield plateau, which makes them suitable under resource constraints situations.
Aim: To standardize the ratio of household waste and cow dung for quality vermicompost based on physical properties. Study Design: Completely Randomized Design (Factorial). Place and Duration of Study: Vermicompost Production Unit, RPCAU, Pusa during April 2018 to June 2018. Methodology: Household waste was combined with cow dung in three different proportions (35:65, 50:50 and 65:35 ratio of household waste and cow dung, respectively) along with rock phosphate and suitable species of earthworms @ 2 kg per ton of material at suitable temperature and moisture (370C and 65% w/w respectively) under shade. Various physical parameters were analyzed at 30, 60 and 90 days after setting the windrows. Results: Vermicompost prepared from household waste and cow dung in (50:50) ratio recorded lowest moisture content 16.0% and highest water holding capacity (20.7%) at the end of vermicomposting process (90 days) and 94% of material passed through 4.0 mm IS sieve. Conclusion: Vermicompost prepared from household waste and cow dung in equal proportion (50:50) emerged out as better quality vermicompost based on the observed physical characteristics.
Volatilization of NH3 from urea and other N fertilizers is controlled by a number of diverse soil properties and environmental conditions that make losses difficult to predict in the field. In general, higher pH, temperature, crop residue, and moisture conditions increase the potential for volatilization, while increased incorporation depth from tillage, rain, or irrigation decrease volatilization potential. Due to soil characteristics such as high Cation Exchange Capacity and buffering capacity, substantial inputs of bicarbonates and Ca on irrigated land, and generally cool conditions during major fertilizer application periods, the potential for substantial urea volatilization in many cropping systems of the is likely relatively low. Nevertheless, the lack of direct field measurements of NH3 volatilization is coupled with the complexity of fertilizer management practices for the many diverse crops grown in the area is reason to exercise caution and use good urea management practices. Understanding the factors that influence volatilization will allow urea users to select management practices that minimize volatilization.
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