Effect of sewage sludge and inorganic fertilizer application on physico-chemical properties of soil and yield of carrot (Daucus carota L.)

Studies were carried out to investigate how sludge application improves the yield of carrots (Daucus carota L.). The experiment was conducted during the year 2010 and 2011 in the Rabi season. The area selected for the present investigation was situated at research farm in School of Forestry & Environment, SHIATS (Sam Higginbottom Institute of Agriculture, Technology & Sciences, Deemed-to-be University). Sludge application resulted in an increase in Available Nitrogen, Available Phosphorus, Available Potassium and Organic matter content. Sludge application also significantly increased the yield of carrot. Carrot grown with the application of Sewage sludge @ 0 t/ha and without inorganic fertilizer (T1) yielded 7.25 t/ha in 2010 and 8.15 t/ha in 2011, respectively. In 2010 the maximum yield were recorded in T11 with the application of Sewage sludge @ 20 t/ha and 100 % RDF yielded 18.50 t/ha followed by 17.32 t/ha in T10 with the application of Sewage sludge @ 20 t/ha and 50 % RDF. In 2011 the maximum yield were recorded in T9 with the application of Sewage sludge @ 15 t/ha and 100 % RDF yielded 16.25 t/ha, followed by 15.75 t/ha in T11 with the application of Sewage sludge @ 20 t/ha and 100 % RDF.