Review: "Influence of Macro Nutrients on Plant Yield of Sunflower (Helianthus annuusL.)"

Sunflower (Helianthus annuusL.) is an important crop ranks fourth next to soybean, groundnut and rape seed in total production of oilseeds of the world. It has been recognized as a crop with high potentials that can successfully meet future oil requirements of the country. The lower productivity of sunflower is mainly due to insufficient supply of nutrients, non-adoption of proper crop rotation and weed management practices and also continuous use of inorganic fertilizer deteriorates soil health and also which makes soil unproductive for next season. Formulation of macronutrients (MN) based fertilizer, in terms of application rate and method, and uptake of MN by sunflower has the ability not only to ensure nutrients availability to plants particularly in MN limiting environments but also can manipulate the environmental hazards associated with over inorganic fertilization. To support this view, clear experimental evidence is still lacking. In addition, the current review aimed to brief the influence of MN on yield and yield components of sunflower cultivars/hybrids.