G SURESH, et al. “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, vol. 32, no. 2, Dec. 2015, https://doi.org/10.56739/jor.v32i1.141817.