Effect of Soil Moisture Status on Seed Quality of Bambara Groundnut (Vigna subterranea L. Verdc.) Cultivars in Ghana

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Studies were carried out in Ghana, to determine seed quality of Bambara groundnut, using two cultivars; Jabajaba (cream-seeded) and Chichele Balgu (red-seeded), under three soil moisture regimes of 30-40, 50-60 and ≥70%. Soil moisture significantly (LSD 5%) affected seed size, protein and tannin contents of Bambara groundnut. Tannin content was lower at ≥70% soil moisture than at 50-60% soil moisture but highest at 30-40% soil moisture. The 50-60% soil moisture favored good seed size and protein content than at 30-40 and ≥70% soil moisture regimes. The 30-40% soil moisture did not favor good quality seed development of Bambara groundnut cultivars. At each moisture regime, cream-seeded cultivar (Jabajaba) recorded lower seed sizes, higher protein and lower tannin contents than red-seeded cultivar (Chichele Balgu). Selecting cultivars with high protein and low tannin contents and growing them under optimum conditions that favor 50-60% soil moisture regime will improve seed quality of Bambara groundnut.

J.K. Laary
K. Ofori
F.K. Kumaga
Asian Journal of Agricultural Research