Effect of irrigation with sewage water on performance of groundnut (Arachis hypogea L.) and soil properties

Abstract

A field experiment to study the “Effect of irrigation with sewage water on performance of groundnut (Arachis hypogea L.) and soil properties” was carried out at College of Agriculture, Shivamogga under irrigated condition during summer 2018. The experiment was laid out under randomized complete block design with nine treatments replicated thrice. Irrigable water (IR), treated sewage water (TSW) and untreated sewage water (UTSW) alone and in conjunctive mode in different proportion were used as treatments. Irrigation with untreated sewage water alone has recorded the highest number of pods per plant (20.37), pod weight per plant(14.14 g), pod yield (2534 kg ha-1) because of high nutrient content of untreated sewage water ( 13.49 ppm of N, 18.94 ppm of P and 19.03 ppm of K) without any toxic and heavy metals. The quality parameters viz., shelling percentage (65.19 g), oil content (51.67%) and protein content (25.73%) were also found highest in plots irrigated with untreated sewage water. Soil irrigated with UTSW alone significantly increase soil available nitrogen (295.16 kg ha-1), phosphorous (84.13 kg ha-1) and potassium (128.84 kg ha-1).