Vol. 9, Special Issue 9, Part C (2025)

A field experiment was carried out during the Rabi season of 2024-25 at the Crop Research Farm, Department of Agronomy, Naini Agricultural Institute, SHUATS, Prayagraj, to study the “Effect of Potassium and Boron on growth and yield of mustard (Brassica juncea L.)”. The experiment was laid out in a Randomized Block Design with ten treatments comprising three levels of potassium (30, 40 and 50 kg/ha), three levels of boron (1.0, 2.0 and 3.0 kg/ha), a control (80:40:40 NPK kg/ha) along with recommended fertilizer dose, and replicated thrice. The results indicated that the application of 50 kg/ha Potassium with 2.0 kg/ha Boron (T₈) produced significantly superior growth and yield performance, reflected in maximum plant height (184.24 cm), dry weight (27.33 g), branches/plant (18.13), siliquae/plant (295.87), seeds/siliqua (17.13), seed yield (2.54 t/ha), and stover yield (6.24 t/ha). Overall, the study suggests that balanced application of potassium and boron in combination enhances both growth and productivity of mustard under the agro-climatic conditions of Prayagraj.