Nitrogen Fixation and N-Balance Studies on Bambara Groundnut (Vigna subterraneaL. Verdc) Landraces Grown on Tropical Acidic Soils of Malaysia

Performance of Bambara groundnut (Vigna subterranea L. Verdc.) with rice husk biochar and Christmas Island Rock Phosphate application

“…The experimental materials used consisted of two landraces (Kaaro and Ex-Sokoto) of Bambara groundnut characterized by Musa et al (2016), Christmas Island Rock Phosphate (CIRP) [32% P 2 O 5 , 3.6% solubility using 2% Neutral Ammonium Citrate (NAC)] which was obtained from the distribution company at Shah Alam, Malaysia and rice husk biochar was sourced from Ladybird Organic Farm, 43500 Jalan Broga, Semenyih, Selangor, Malaysia. The biochar was produced from intermediate pyrolysis of rice husk at 600 °C in a fixed bed pyrolysis system.…”

“…Data were taken on N concentration, N content, % nitrogen derived from the atmosphere (% ndfa), N fixed in the shoot, and N fixed in the whole plant. The plant nitrogen content was determined as the product of plant dry weight and % N in the plant as suggested by Unkovich et al (2008): 15 The N analysis was conducted using the procedure reported by Musa et al (2016).…”

“…N fixation was measured using 15 N natural abundance (NA) procedure as suggested by Mohale et al (2014). The 15 N NA of the whole plant (grain plus stover) was measured using the method of Unkovich et al (2008) The % ndfa was calculated using the method reported by Musa et al (2016).…”

“…The seeds of the crop contain 16-25% protein, 5-6% lipid, 42-60% carbohydrate, 4.8% fibre, and 3.4% ash (Brough and Azam-Ali 1992). The crop fixes 20-100 kg N/ha (Musa et al 2016). Bambara groundnut such as other grain legumes is an important component of African traditional cropping systems grown as intercrop or in rotation with other crops such as sorghum (Sorghum vulgare) and pearl millet (Pennisetum glaucum) (Dakora and Keya 1997).…”

Assessment of bambara groundnut landraces for resistance to <i>Cowpea aphid borne mosaic virus</i>

“…In recent years there has been a renewed interest in the cultivation of bambara groundnut (Ouoba et al, 2016). This is partly due to many potentialities available into the plant such as soil improvement through atmospheric nitrogen fixation (Musa et al, 2016), its importance in the food balance for populations, especially in rural areas (Bamshaiye et al, 2011), its wellbalanced chemical composition of carbohydrate 63%, protein 19% and fat 6.5% (Mkandawire, 2007;Mbaiogaou et al, 2013), its economic and social importance (Gbaguidi et al, 2015;Nadembèga, 2016).…”