article · International Journal of Agronomy
A two-year field study in the dryland areas of Abergelle District, Ethiopia, evaluated how different combinations of nitrogen and phosphorus fertilisers affect the yield of the Rasa mung bean variety. Researchers tested three nitrogen rates alongside four phosphorus rates to identify optimal application levels. The results showed that both fertilisers significantly influenced plant growth and overall productivity. The highest physical grain yield and dry biomass were achieved using 52 kilograms per hectare of nitrogen combined with 90 kilograms per hectare of phosphorus. However, an economic assessment revealed that a slightly lower nitrogen rate of 41 kilograms per hectare paired with 90 kilograms per hectare of phosphorus delivered the best marginal rate of return. Consequently, this specific combination is identified as the most economically viable strategy for local production.
Mung bean is an important pulse crop, but farmers in dryland areas often lack clear guidance on how to balance fertiliser inputs for maximum profit. This study establishes clear fertiliser benchmarks that boost harvest yields while keeping production costs sensible, helping local growers make informed, cost-effective decisions.
This research offers an applied and tested agronomic recommendation ready for immediate uptake by smallholder farmers and agricultural extension programmes in the region. The findings can directly inform regional agricultural advisory packages and input-supply planning to improve dryland mung bean farming without requiring additional technical development.
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A field experiment was conducted during the 2023 and 2024 main cropping seasons in the dryland areas of Abergelle District to determine the optimum rate of nitrogen and phosphorus fertilizers for maximizing mung bean yield. The factorial combined treatments of four rates of phosphorus (0, 30, 60, and 90 kg ha −1 ) and three rates of nitrogen (30, 41, and 52 kg ha −1 ) were laid out in a randomized complete block design (RCBD) with three replications. An improved variety of mung bean known as “Rasa” was used as a treatment material. The results showed that the phenological, growth, yield, and yield‐related parameters of mung bean were significantly affected by the main and interaction effects of nitrogen and phosphorus rates. The highest pods per plant (14.16), grains per pod (15.73), above‐ground dry biomass yield (9250.00 kg ha −1 ), and grain yield (2050.80 kg ha −1 ) were obtained from the interaction of 52 × 90 kg ha −1 nitrogen and phosphorus application. Based on economic analysis, the highest net benefit (153,004.78 birr ha −1 ) and marginal rate of return (6474.79) were observed under the interaction of 52 kg ha −1 nitrogen and 90 kg ha −1 phosphorus rates and 41 kg ha −1 nitrogen and 90 kg ha −1 phosphorus rates, respectively. While the combination of 52 kg ha −1 nitrogen and 90 kg ha −1 phosphorus produced the highest agronomic yields, the application of 41 kg ha −1 nitrogen and 90 kg ha −1 phosphorus provided the best economic return (highest MRR %). The result clearly showed that, with optimum application of nitrogen and phosphorus fertilizers, it is possible to produce maximum and economically feasible yield of mung beans. As a result of this, a 41 kg ha −1 nitrogen and 90 kg ha −1 phosphorus fertilizer combination can be recommended as an efficient and economical mung bean production to be used for smallholder farmers in the dryland areas of Abergelle District, Wag Himra Zone, Amhara region, Ethiopia.
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DOI: 10.1155/ioa/2585964
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