~ 1357 ~ The Pharma Innovation Journal 2022; 11(9): 1357-1360 ISSN (E): 2277-7695 ISSN (P): 2349-8242 NAAS Rating: 5.23 TPI 2022; 11(9): 1357-1360 © 2022 TPI www.thepharmajournal.com Received: 17-06-2022 Accepted: 26-08-2022 L Peace Raising Ph.D., Department Scholar of Agronomy, GBPUA&T, Pantnagar U.S. Nagar, Uttarakhand, India V Pratap Singh Professor, Department of Agronomy, GBPUA&T, Pantnagar U.S. Nagar, Uttarakhand, India Subhas Chandra Chief Scientist, Department of Agronomy, GBPUA&T, Pantnagar U.S. Nagar, Uttarakhand, India Arya kumar Sarvadamana Ph.D., Department Scholar of Agronomy, GBPUA&T, Pantnagar U.S. Nagar, Uttarakhand, India Corresponding Author: L Peace Raising Ph.D., Department Scholar of Agronomy, GBPUA&T, Pantnagar U.S. Nagar, Uttarakhand, India Performance assessment of bio-decomposer and nitrogen management on emergence and NDVI values under super seeder sown wheat (Triticum aestivum L.) following combine harvested rice L Peace Raising, V Pratap Singh, Subhas Chandra and Arya Kumar Sarvadamana Abstract Conservative tillage practises have recently grown in popularity in India, particularly in the upper Indo- Gangetic plain under the rice-wheat cropping system (RWCS). The management of combine harvested rice is the most challenging task for Indian farmers in the RWCS. Among all the on-farm management of rice residue viz., surface retention, incorporation (in-situ) and composting (ex-situ) and the recent practice i.e., use of bio-decomposer, are the promising options to address the issue of burning as well as maintaining soil health for long-term sustainability of RWCS. For which there were several issues that needed to be addressed with the incorporation of crop residues. Management on emergence performance is one such issue that must be addressed for increased grain yield. Furthermore, the incorporation of organic crop residues into the soil would result in a higher C:N ratio, which could contribute in nutrient immobilisation during seedling growth. As a result, to address the aforementioned issues a field experiment was carried out for two years on performance assessment of bio-decomposer and nitrogen management on emergence and NDVI values under super seeder sown wheat (Triticum aestivum L.) following combine harvested rice at G. B Pant University of Agriculture and Technology, Pantnagar 2020-21 and 2021-22. The experiment conducted was laid in split plot design consists of 12 treatments with two factors as main: with and without bio-decomposer and nitrogen levels (Nitrogen @180 kg/ha and nitrogen @150 kg/ha) and one factor as sub-plot: three nitrogen splits as 50% + 25% + 25%; 40%+30%+30%; and 30%+35%+35%. Significantly higher emergence and NDVI value was observed under Nitrogen @180 kg/ha and similarly higher emergence and NDVI value was recorded significantly when nitrogen was schedule as 50% + 25% + 25% during both the years of experimentation. Although the inclusion of a bio-decomposer had no significant effect on either parameter, a numerical increase was observed in addition to benefiting the sustainable environment. Keywords: Bio-decomposer, C:N ratio, conservative tillage, emergence, incorporation, indo-gangetic, immobilisation, nitrogen, NDVI and super seeder Introduction Conservative tillage practises have recently grown in popularity in India, particularly in the upper Indo-Gangetic plain under the rice-wheat cropping system (RWCS). The management of combine harvested rice is the most challenging task for Indian farmers in the RWCS. Farmers resort to burning to manage such a massive amount of rice residue. Rice residue contain around 0.7% N, 0.23% P, and 1.75% K and it is also an important source of micronutrients such as Zinc and is also rich in Silicon (Goswami et al., 2020) [4] . Therefore, the need for providing a cost-effective and farmer friendly option for the management of rice residue is both a major challenge as well as an opportunity for the sustainability of the intensive RWCS in North-West India. As a result, on farm management of rice residue like surface retention, incorporation (in-situ) and composting (ex-situ) and the recent application i.e., use of bio- decomposer, are the promising options to address the issue of burning as well as maintaining soil health for long-term sustainability of RWCS. The soil–atmosphere interface formed by the seedbed layer is of a particular concern to agronomists and soil scientists as it is the focus of the physical processes controlling crop establishment, biological activity, water infiltration and runoff. Initial plant population has direct bearing on crop yield and seedling emergence influences the initial plant population. Gan et al. (1992) [2] reported that the wheat plants that emerged early contribute more towards crop yield than those that emerged later.