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Articles by W.B. Binang
Total Records ( 3 ) for W.B. Binang
  W.B. Binang , F. Ekeleme and J.D. Ntia
  The aim of this field study conducted in Calabar, Southeastern Nigeria was to investigate whether mixtures of rice cultivars with different characteristics and in varying proportions and deployment times could be effective in suppressing weed growth. Two lowland rice cultivars; Faro 15 (improved, semi-dwarf, profuse tillering, lodge-tolerant, early maturing),and Muduga (local, tall, lodging-susceptible ,medium maturing), were raised in nurseries and 24 day old seedlings transplanted, 2 seedlings per hill at 20x20 cm spacing. Treatments were factorial combinations of 2 planting proportions (Faro 15: Muduga at 4:1 and 3:2) and 5 times of introduction (Faro 15 introduced 2 weeks before, 1 week before, same day as, 1 week after and 2 weeks after-Muduga). The results indicate that in rainfed, low-input, lowland rice production systems, cultivar mixtures can improve the competitive ability of rice, reducing weed biomass production and diminishing rice biomass losses. Across both cultivars, the population of weeds was reduced by 39.7% when Faro 15 was introduced 2 weeks after Muduga in a 3:2 ratio, but the effect on weed biomass was not significant. The time of component cultivar introduction significantly affected the weed suppressive ability of the mixture and the best time depended on the grain preference of the farmer. On the basis of combined grain yield, introducing Muduga 1 or 2 weeks after Faro 15 gave the best results.
  M.I. Anya , N.I. Ofem , W.B. Binang and E.P. Umoren
  Globally, agriculture is widely accepted as one of the sectors at most risk from climate change challenges. Due to impacts of increased temperatures, reduced rainfall and increased frequency of variation in extreme events especially in the tropics. Agriculture is central to the food security and economic growth of developing nations, providing the main source of livelihood for the world’s poor. Climate change will impact significantly on food security. It will affect food production and availability, the stability of food supplies, access to food and food utilization. However, the poorest farmers are the most vulnerable and the most challenged to the impacts of climate change. Africa is the region with greatest risk of increased hunger and threatened livelihoods due to climate change. This study briefly reviews the potential impact of climate change on food security in reducing by half the proportion of people suffering from hunger by 2015.
  W.B. Binang , J.D. Ntia and O.J. Shiyam
  The mangrove swamp soils of the Cross River estuary are suitable for intensive rice cultivation because of ample water supply, large level units and high inherent fertility. However, because water is abundant, rainfall does not determine the sowing period. Field studies were conducted in 2006 and 2007 at Obufa Esuk Orok adjacent the University of Calabar Teaching and Research Farm to determine the best seeding date for two salt-tolerant rice varieties grown on a mangrove swamp soil in the Cross River estuary, southeastern Nigeria. Two mangrove rice varieties namely ROC 5 and CK 73 were raised in nurseries on 6 December, 8 January, 4 February and 4 March, of each year and 30 day-old seedlings transplanted at a plant spacing of 20x20 cm and at 2 seedlings per hill. Treatments comprised factorial combinations of four seeding dates and two varieties laid out in a split-plot design; the main- plot being the date of seeding and the sub-plot the variety. Significant varietal differences were observed, with CK 73 performing better than ROC 5. During the 2006 and 2007 growing seasons, paddy yield of 4.35 and 5.14 t ha-1 obtained from sowing in February was higher than yield values for December, January and March plantings by 14.5, 27.6 and 18.2% (2006) and 37.9, 41.8 and 18.9% (2007). Seeding conditions in December through January were unfavorable because in the absence of water control, the frequent and unpredictable tidal water flow washed away seeds and seedlings, leading to poor germination, seedling establishment and reduction of the crop’s tillering capacity and panicle formation. These conditions were ameliorated in February and March and the favorable solar radiation levels and temperature regime that subsisted in April and May when the February sown crop matured accounted for the superiority of this seeding period. It would however, be unsuitable to seed late-maturing varieties at this period because they would mature during the peak rains when natural drying conditions would be unfavorable.
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