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Unlike various other high value crops, the direct involvement of small and marginal farmers is very intense in the cultivation of maize. There is immense potential in the Indian Agribusiness ecosystem because of its value of output and degree of involvement of maize growers. Due to recent research advancements, the quality protein maize, single cross and 3-way cross hybrids have given a fillip to the nutritional quality of this cereal (NCoMM Special report, 2017). Indian maize production depends heavily on the Southwest monsoon as more than three-fourth of the maize is produced in the Kharif season. Maize is the third largest food grain crop next to wheat and rice, occupying 9.21 million hectares in India with a total production of 25.13 million tonnes and productivity of 6555 kg ha for both kharif and rabi seasons. In Tamilnadu (2018-19), maize occupies an area of 0.38 million ha with a production of 2.51 million tonnes and productivity of 6.55 T ha (Agricultural statistics at a glance, 2019). In general, human population suffers from micronutrient deficiencies, which occurs due to inadequate intake of essential micronutrients in daily diet. To combat these deficiencies, the biofortification process through agronomic practices offers a sustainable solution, a shortterm approach and the easiest way of availability in the diet through the edible parts (Roman et al., 2019).Although simple and inexpensive, the application of fertilizers containing essential mineral micronutrients Abstract Agronomic biofortification increases the concentration of target mineral in edible portions of crops by the use of mineral fertilizers to increase dietary intake of target minerals. Among these iron and zinc deficiencies in human nutrition are noticed in countries where maize is the staple food. The objective of this study was to evaluate agronomic biofortification performance in association with Integrated Nutrient Management in maize (Zea mays .L). The study was conducted under field conditions in Chinnakandiankuppam village, Vriddhachalam Taluk, in the North-eastern region of Tamil Nadu state, India of Kharif 2020 season. Two hybrids in main plots (M1 – Non biofortified and M2 – Biofortified) were combined with six treatments in sub-plots (100 % RDF through NPK (S1), 100 % RDF through FYM (S2), 50% RDF through NPK + 50% through FYM (S3) as soil application, S1+ Zinc + Iron (S4), S2 +Zinc + Iron (S5) and S3 + Zinc + Iron (S6) as foliar application with evaluations were carried out in wet season period of the year. Application of 50 per cent RDF through NPK + 50 per cent RDF through FYM with Fe, Zn, foliar applications (S6) was the most efficient agronomic biofortification practice for growth attributes, yield and yield attributes, nutrient uptake and quality parameters for the maize cropping system under irrigated condition of north eastern zone of Tamilnadu State, India.

journal of applied and natural science

Effect of agronomic biofortification on growth, yield, uptake and quality characters of maize (Zea mays .L) through integrated management practices under North-eastern region of Tamil Nadu, India