Zinc and boron micronutrients on yield and economics of sunflower grown on coastal regions of northern tamilnadu, india

A field experiment was carried out at Experimental Farm, Annamalai University, Annamalainagar, Tamil Nadu during summer season of 2014-15 (February to May) to study effects of soil and foliar applied micronutrients on yield and economics of irrigated sunflower. The trial includes 12 treatment combinations with recommend dose of fertilizer (RDF) with combinations of zinc and boron soil and foliar nutrition at various crop growth stages. The experiment revealed that 60 kg N, 90 kg P2O5 and 60 kg K2O ha -1 along with soil application of ZnSO4 @ 25 kg ha and borax @ 5 kg ha and foliar application of ZnSO4 @ 0.5 per cent at star bud stage and borax @ 0.2 per cent at ray floret stage was the most favourable micronutrient management practice for obtaining maximum achene yield, oil yield and higher economic returns.