Nitrogen Uptake and Quality Parameters in Groundnut [Arachis hypogaea (L.)] Influenced by Different Weed Management Practices under Arid Zone of Rajasthan, India

Abstract

The field experiment was conducted at Agricultural Research station, Mandor, Agriculture University, Jodhpur during kharif, 2019 to evaluate nitrogen uptake and quality parameters as influenced by different weed management practices in kharif groundnut. The experiment was laid out in randomized block design (RBD) with thirteen treatments of replicated thrice. Results revealed that weed-free treatment found significantly higher total nitrogen uptake by crop, protein content in kernel, oil out-turn and lowest amount of nitrogen removal by weeds compared to weedy check. Among the herbicidal treatments, application of pendimethalin + imazethapyr at 1.0 kg/ha + one manual weeding at 30 DAS recorded significantly higher total nitrogen uptake by crop (240.8 kg/ha), protein content in kernel (25.8%), oil out-turn (1214.7 kg/ha) and lowest amount of nitrogen removal by weeds (0.4 kg/ha) which was closely followed by pendimethalin at 1.0 kg/ha (PE) + imazethapyr at 75 g/ha 20 DAS, pendimethalin at 1.0 kg/ha (PE) + one manual weeding at 30 DAS and pendimethalin + imazethapyr at 1.0 kg/ha (PE) + quizalofop-p-ethyl at 50 g/ha at 20 DAS.