​Influence of Micro Climatic Indices on Growth and Yield of Direct Seeded Upland Rice (Oryza sativa L.) Varieties in Assam

Background: Rice (Oryza sativa L.) is the major cereal crop grown in India. plays a pivotal role socio-cultural life of people Assam. The main objective this study to investigate influence micro climatic indices relation growth and yield upland rice varieties with different dates sowing Methods: A field experiment was carried out at Instructional cum Research Farm, Assam Agricultural University, Jorhat during autumn season 2017. consisted four micro-climatic regimes (M) along (V). Result: results revealed that viz., canopy temperature, growing degree days, soil moisture content, light intensity, depth ground water table associated 1st April sown recorded positive effect on parameters terms plant height, leaf area index, number filled grains per panicle, test weight, harvest index grain (3004 kg/ha), followed by micro-climate 16th March crop. Among evaluated, CR-Dhan 203 highest 2860 kg/ha significantly superior other except Inglongkiri.