COMPARATIVE STUDY OF TWO NIGERIAN BEANS VARIETIES PRODUCTIVITY THROUGH DIFFERENT APPLICATION OF NODUMAX BIOFERTILIZATION
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Date
2025
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Abstract
his study investigated the effects of varying concentrations of Nodumax (0.5g, 1g and 5g) on the growth and
reproductive performance of two cowpea (Vigna unguiculata) varieties—Ife brown and Ife omo at the
Greenhouse of the Department of Plant and Environmental Biology, Kwara State University, Malete, Nigeria.
A number of three seeds were planted per pot, and each treatment was replicated three times. Prior to planting,
three concentrations [low (0.5g), high (5g) and IITA Standard inoculum of concentrations of Nodumax], were
applied to the soil. Uninoculated pots served as controls. Growth parameters were assessed monthly from April
to June, while reproductive traits were measured after three months. Results revealed that high Nodumax
concentration (5g) significantly enhanced nodulation and biomass. For instance, Ife omo recorded the highest
nodule count (34.77 ± 0.03), pod with seeds (10.38 ± 0.07), and wet weight (28.04 ± 0.17g) in June under high
concentration. Similarly, Ife brown showed improved stem length (30.80 ± 0.06 cm) and number of leaves
(19.60 ± 0.06). High Nodumax treatments outperformed both the IITA Standard and control, indicating a
positive correlation between rhizobial concentration and plant performance. This study fills a critical gap in
cowpea agronomy by demonstrating that optimized rhizobial inoculation enhances varietal productivity and
supports sustainable legume-based farming system