K S SOMASHEKAR et al. 2020. Efficacy of pre and post-emergence herbicide on growth, yield and economics of sunflower (Helianthus annuus L.) under modified spacing: Efficacy of pre and post-emergence herbicide on growth, yield and economics of sunflower (Helianthus annuus L.) under modified spacing. Journal of Oilseeds Research. 37, Specialissue (Mar. 2020). DOI:https://doi.org/10.56739/jor.v37iSpecialissue.140849.