Response of groundnut to integrated nutrient and weed management practices on weeds, growth and yield
*1G. Mohanraj, 1R. Krishnamoorthy, 2R. Raman and 3K. Kanagasabapathi
1,2Department of Agronomy, 3Department of Agricultural Extension, Faculty of Agriculture, Annamalai University, Annamalai Nagar – 608002 (India) *Corresponding Author:uzhavanmohan@gmail.com
ABSTRACT
The field experiments were made in irrigated groundnut to optimize the integrated nutrient and weed management practices for augmenting groundnut productivity at farmers field Sananandal village, Tiruvannamalai District, Tamilnadu, India. The experiment was laid out in split plot design with three replications. The details of the treatment in main plots are M1-RDF, M2- -RDF + vermicompost @5 t ha-1 , M3- - RDF +FYM @ 12.5 t ha-1, M4- -RDF + coirpith @ 12.5 t ha-1 and the subplots are S1- weedy check, S2- weed free, S3- hand weeding twice (20DAS and 45DAS), S4- pre sowing pendimethalin @3.3 l ha-1 + hand weeding at 30 DAS , S5- pre emergence Diclosulam @ 30.9 g ha-1 + hand weeding at 30 DAS , S6 post emergence Imazethepyr @ 750 ml ha-1 + hand weeding at 40 DAS , S7 – Pre sowing Pendimethalin @ 3.3 l ha-1 + Post emergence Imazethepyr @ 750 ml ha-1. The results of the study evidently proved that RDF + vermicompost (M2) recorded highest growth and yield parameters in main plot. And pre emergence application Diclosulam + hand weeding at 30 DAS (S5) recorded lowest weed population in subplot. It can be concluded that application of recommended RDF + vermicompost along with pre emergence Diclosulam + hand weeding at 30 DAS ( M2S5) as an agronomically efficient , ecofriendly and economically viable technology for improving groundnut growth and yield parameter. This treatment (M1S1) combination registered lowest values for weed density, weed biomass and maximum weed control index and maximum values for growth, yield parameter and yield of groundnut.