G SURESH et al. 2015. Productivity and nutrient use of sunflower (Helianthus annuus L.) in sequential cropping system in Vertisols: PRODUCTIVITY AND NUTRIENT USE OF SUNFLOWER IN SEQUENTIAL CROPPING SYSTEM IN VERTISOLS. Journal of Oilseeds Research. 32, 2 (Dec. 2015). DOI:https://doi.org/10.56739/jor.v32i1.141817.