Abstract
Background: French bean is an important legume vegetable crop. Due to its low ability to fix atmospheric nitrogen, excess amount of nitrogenous fertilizers are required by this crop as compared to other legumes. Overwhelming application of inorganic inputs has severely impacted environment and soil. So, there is a need to reduce inorganic inputs by adding organic nutrient sources. Methods: A three-year field experiment was laid comprising of eight treatment combinations and was replicated thrice during Kharif season of 2018, 2019 and 2020. Seeds of French bean cv. Green Wonder were sown at a spacing of 45 × 15 cm in each plot of size 3.0 m × 1.8 m. Recommended dose of fertilizers (NPK 50:100:50 kg ha-1) was followed as per different treatment details. Result: Application of 75 per cent NPK through inorganic and 25 per cent N through vermicompost resulted in minimum days to first pod harvest (61.89 days), maximum pod width (7.67 mm), number of pods per plant (30.96), plant height (51.29 cm), average pod weight (5.70 g), marketable pod yield (130.53 q ha-1) and highest benefit cost ratio (2.18) along with maximum net returns (Rs. 313061.43 ha-1).
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