Vol. 12, Issue 12 (2023)

Author(s):
SD Thite, PS Bodake, VG Chavan, NA Meshram, SV Sawardekar, PP Mhatre and Vishwajeet Navnath Kale

Abstract:
Present era, Synthetic fertilizers used extensively in agriculture typically have low Nutrient Use Efficiency (NUE) values. In order to boost nutrient use efficiency, decrease fertilizer waste and lower cultivation costs, hence nano fertilizers are key instruments in agriculture. In order to achieve high rice output with effective N management, a tool that can quickly detect leaf N status and then direct the application of fertilizer N to maintain an appropriate leaf N content can be essential. Keeping this view, the present investigation is plan to study the Precision nitrogen management in rice through Nano-urea by calibrating the leaf colour chart (LCC) in Konkan Region. The experiment was conducted at Agronomy farm, College of Agriculture, Dapoli, Dist. Ratnagiri (M.S.) during kharif, 2022. LCC based application of nano urea has positive effect on growth, yield attributes and yield and uptake of nutrients in rice crop. The treatment RDN 50% Basal + LCC < 4 35 Kg N through nano urea (T₉) significantly shows the higher uptake and yield as compare to other treatments. It showed 67.24% and 66.36% higher grain and straw yield, respectively over control. While treatment RDN 50% Basal + LCC < 4 35 Kg N through nano urea (T₉) showed higher net return (Rs 31425.36 ha^-1) and B:C ratio (1.38) over all the other treatments.