Effect of Nano DAP Application on Growth Attributes of Wheat in Irrigated Plains of Northwestern Rajasthan

A field experiment was conducted during the Rabi season of 2024-25 at Instructional Agronomy Farm, Tantia University, Sri Ganganagar, Rajasthan, India, to evaluate the effect of foliar-applied micronutrients on the growth parameters of wheat (Triticum aestivum L.). The experiment was laid out in a Randomized Block Design with seven treatments and three replications, including control (T1: 0% P₂O₅), conventional DAP applications (T2: 100%, T3: 25%, T4: 50% P₂O₅), and nano DAP treatments combining seed treatment with foliar sprays (T5-T7). Results demonstrated that nano DAP application significantly enhanced all growth parameters compared to conventional DAP and control. Treatment T6 (seed treatment + two foliar sprays @ 2ml/L nano DAP) proved most effective, recording maximum plant height (96.35 cm), dry matter accumulation (890.26 g/plant), number of tillers (499.48/m²), spike length (14.66 cm), and leaf length across growth stages. The superior performance of nano DAP treatments highlights their potential to improve phosphorus use efficiency and wheat productivity, suggesting nano-fertilizers as a sustainable alternative to conventional phosphorus fertilization in wheat cultivation.