Cross River University of Technology

About: Cross River University of Technology is a education organization based out in Calabar, Nigeria. It is known for research contribution in the topics: Population & Exergy. The organization has 465 authors who have published 507 publications receiving 2705 citations.

Effect of Plant Population on the Growth and Yield of Mucuna Flagellipes (Vogel ex Hook) in an Ultisol, South Nigeria

Abstract: The effect of plant population on the growth and yield Mucuna flagellipes (Vogel ex Hook) was conducted for two cropping seasons (2013 and 2014) in the Teaching and Research farm, Department of Agronomy, Cross River University of Technology Obubra, Cross River State. The experimentwas laid out in a randomized complete block design (RCBD). Treatments comprised four plant populations of 33,333, 16,666, 10,000 and 8,333 plants/ha and there were three replications. Data collected were statistically analyzed using Analysis of Variance (ANOVA) procedure for a randomized complete block design. Close spacing with high plant population significantly (p < 0.05) reduced the number of leaves, branches and dry matter of plant fractions per plant. The longest vine of 594.1 and 651.3cm and leaf area index of 7.462 and 7.609 were produced in plant population of 33,333 plants/ha at 24 WAP in 2013 and 2014 cropping seasons respectively. Pod and seed yield per plant were higher in plots with the least plant population of 8,333 plants/ha as compared with other higher plant population of 33,333 and 16,666 plants/ha. The highest Mucuna flagellipes seed yield of 2.85 and 2.91 tons/ha were produced from plots with 33,333 plants/ha in 2013 and 2014 cropping seasons.

Heavy Metals Pollution Indices in Tannery Sludge Fertlized Farms around Hausawan Kaba, Kano, Nigeria

Abstract: A study was conducted to assess the influence of tannery sludge on heavy metals pollution indices in Hausawan Kaba, Kano, Nigeria. Three farms were randomly selected as sampling stations and named farm 1, farm 2 and farm 3. Soil samples were collected using soil auger, digested using concentrated HCl and analysed using Flame Atomic Absorption Spectrophotometer (FAAS). The highest metal concentration was Pb in Farm 2 with an average value of 130.62 ± 61.12 while the lowest was Cadmium in Farm 3 with a concentration of 1.33 ± 2.17 mg/kg. All metal concentrations differed significantly across farms at 0.05 level of significance and they have exceeded World Health Organization (WHO) 1996 maximum permissible limits. The metals with the highest contamination factor was Cadmium ( Cf = 8.51) in Farm 2 while Iron had the lowest with about 0.001 in Farm 3. Cadmium had the highest enrichment factor value in Farm 2 ( Ef = 4634.92) while Fe had the lowest Ef of 1.00 in all farms. The lowest geoaccumulation index ( Igeo ) was – 8.77for Pb in Farm 2 while the highest was 15.39 for Cadmium in Farm 3. Igeo >5 showed that all the farms are extremely polluted with heavy metals. Pollution load index (PLI) occurred in the order: Farm 3 (0.43) < Farm 2 (0.88) < Farm 1 (1.13). Keywords: Heavy metals, Pollution index, Contamination factor, Enrichment factor, Geoaccumulation index, Pollution load index.

Managing Dissatisfied Customers in Retailing Businesses in Nigeria

Abstract: This study is a theoretical overview of retailing type of business in Nigeria and it encompasses characteristics and types of retail outlets, product-price decision variables, factors that favour their growth, legislative influences and the wheel of retailing. The other aspect is on how retailers or retail stores handle problems of customers’ compliant about dissatisfy products. Basically most retailers use explanations, in the form of excuses, apologies, justification, coupon or compensation and speed (urgency) in attending to such complaint to exonerate them. What is most pertinent is for the retailers to accept responsibility for the poor quality or handling of their products or the injury product must have caused to customers, despite the method use to suppress the dissatisfaction, in order to maintain a cordial relationship between the customers and the retail stores. This will enhance continuous purchases, and generate revenue for the retailers.

Performance and thermo-sustainability analysis of non-hybrid organic Rankine cycles (ORCs) at varying heat source and evaporator conditions

Abstract: The performance and thermo-sustainability indicators (TSI) of non-hybrid organic Rankine cycles (ORCs) are considered at varying evaporator pressure (EVP) and heat source temperature (HST)....

Some Metal Elements Concentration in Malletia cumingii (Hanley, 1860) (Bivalvia) in Okpon River, Cross River State, Nigeria

Abstract: Molluscs are important food item all over the globe. They have been harvested from the wild and some cultured for food; such that 20% of aquatic animal protein comes from molluscs. They have also been widely used as indicator of pollution. On the other hand, many are intermediate hosts of parasitic disease of many animals and man. Malletia cumingii is usually harvested in Okpon River, a tributary of Cross River in Cross River State of Nigeria. Because of the value of Molluscs as indicator of pollution, this species was analyzed to ascertain the metal elements concentration levels for reason that some of these metals are toxic to man. Samples were collected from three locations along the River. Sampling was done two times to include the two main seasons of the year (dry and wet seasons). The samples were oven-dried (MAMMART) at 100°C and were pounded in mortar to powder form. Metal concentrations were measured using flame photometer (RP 7) and atomic absorption spectro-photometer. Metals analyzed included Copper, Cadmium, Chromium, Iron, Manganese, Nickel, Lead, Zinc, Calcium and Magnesium at different wavelengths. Results showed that metal concentration was increasing from the upper reaches of the river downward except zinc. It was suggested that zinc have a point source in the upper reaches while others metals were added to the water body by anthropogenic activities. However, the concentration of the metals did not reach toxic level in the molluscs for human consumption.