Nutritional status of wastewater irrigated soil under lemongrass (Cymbopogon flexuosus)

A field experiment was conducted in a split plot design at ICAR-Indian Agricultural Research Institute (IARI) to evaluate the effects of groundwater (GW), untreated wastewater (WW), constructed wetland treated (TWW) and conjunction with cyclic mode (CW) main plots three levels fertilizers subplots viz. control (no NPK fertilizer application) (N0), recommended dose – amount added through irrigation water (N1) (N2) during 2018-2019 on soil chemical properties. The N, P, K, RSC, Zn, Cu, Mn, Fe, Ni, Pb Cr contents were significantly higher 2.3, 3.7, 2.7, 1.6, 3.1, 2.0, 2.1, 2.9, 7.2 2.3 times more than respectively. initial soils normal reaction having pH 7.34, electrical conductivity 0.29 dSm-1, organic carbon 0.68% available P K 238, 24.6 227 kg ha-1. Similarly, DTPA extractable Mn Fe well above deficiency critical limit but below permissible threshold for toxicity. 0.22, 2.54 0.25 mg kg-1. carbon, macro nutrients (N, K) micronutrients (Zn, Cu Fe) content got improved sewage followed by irrigated alternatively ground water. results demonstrated that raising lemongrass nutritional quality soil.