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Utilization of Sewage Sludge as Organic Fertiliser in Sustainable Agriculture

Keywords: Organic wastes , sewage sludge , calcareous , wheat

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A field experiment was conducted to study the effect of addition of different levels of domestic sewage sludge on the soil properties and yield of wheat crop. Addition of sewage sludge raised soil pH, increased organic matter, ECe, NPK, Ca+Mg and trace metals (Fe, Cu, Mn and Zn) with its increasing levels. Different treatments of sludge also increased the yield and yield attributing components as compared to untreated (control) treatments. Significantly maximum plant height (107 cm), number of tillers (433 m-2) and straw yield (9.82 t ha-1) were obtained where 80 t ha-1 sewage sludge was applied while spike length, number of productive tillers m-2, number of grains spike-1, 1000-grain weight and grain yield were maximum in the treatments amended with 40 t ha-1 of sewage sludge. The study indicates that sludge application at the rate of 40 t ha-1 can enhance economic yield of wheat and also improve soil productivity.


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