The field experiment was conducted at Punjab Agricultural University, Ludhiana and University Seed Farm, Ladhowal, Punjab during rabi season of 2017-18 and 2018-19 with an aim to increase the pace of in-situ microbial decomposition of rice residues and stubbles using preplant dual sprays of two microbial cultures (Delftia or Aspergillus sp.) on happy seeder sown wheat. The experiment consisted of six nitrogen management techniques (kg/ha) in main plots and three microbial applications + an unsprayed control in sub plots and combinations of these were tested in split plot design with three replications. The meteorological indices viz., grain yield heat use efficiency (GY-HUE) and grain yield helio thermal use efficiency (GY-HTUE) were found to be maximum in N5 where nitrogen (N) was applied @ 150 kg/ha preceded by 3% urea spray on in-situ rice residue after paddy harvest. Maximum GY-HUE and GY-HTUE recorded in Delftia sp. i.e. M3. Minimum canopy temperature, maximum NDVI, 1000-grain weight and grain yield prevailed in N5 and M3 treatments. Treatment N5 produced 93.5% and 75.0% higher grain yield over control i.e. N1 at Ludhiana and 64.9% and 77.2% higher grain yield over N1 at Ladhowal during 1st year and 2nd year, respectively. Microbial culture in promoting rice residue decomposition and appropriate nitrogen application are crucial for wheat crop resilience and productivity in the face of changing climate scenarios.