FACULTY OF AGRICULTURE
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Item Effects of orange fleshed sweet potato production on the welfare status of rural farmers in Osun State, Nigeria(2019) Tijani, S. A.Generally, sweet potato is highly adaptable to adverse environmental conditions and also has the potential of increasing food production, income and household food security in many low-income rural communities. Orange fleshed Sweet Potato (OFSP) variety was developed to address health and nutrition problems (Vitamin A deficiency) of Sub-Saharan Africa. OFSP offers new opportunities in terms of shorter period of growth, higher yield, greater tolerance to major stresses, increased carbohydrate and vitamin A content compared to the traditional cultivars. The crop (vines) have been disseminated by research institutes and related agencies for cultivation by farmers. Hence, in this study, the potential of OFSP in improving the welfare status (food, health, education and utility) of the rural farmers in Osun State, Nigeria W3S examined. Purposive sampling technique was used to select three Local Government Areas while 30% of both OFSP and Non-OFSP registered farmers were randomly selected to give 110 respondents. Both questionnaire and FGD were used for data collection while descriptive and inferential statistics were employed for data analyses. Results revealed 56.4% of the respondents were between the age-group of 41-65 years, 85.5% were males, 89.1% were married while 60.9% were educated. Majority (82.7%) have farm sizes between 1-10 acres while only 47.3% have between 4-19 years of farming experience in sweet potato production. Majority (82.5%) of the OFSP farmers have high welfare status compared with low welfare status of all non-OFSP farmers. There was a significant difference (t=9.661) between welfare status of OFSP and Non-OFSP farmers. Education ( 2=52,572), farm size (f0.569) and household size (f0,336) have significant relationships with welfare status of OFSP farmers, In conclusion, cultivation of OFSP has positive effect on the welfare status of the farmers in the in the study area, however, more extension agents should be employed to create awareness about the economic and nutritional values of the crop for sustainable production and increased welfare status of the farmers.Item Utilization of sweet potato as a forage supplement to a maize stover diet by West African dwarf sheep(Animal Science Association of Nigeria, 2005) Olorunnisomo, O. A.; Ososanya, T. O.; Adewumi, M. K.In a growth and digestibility trial with West African dwarf sheep (WAD) the effects of supplementing maize stover with four levels of sweet potato forage (0, 1, 2 and 3% of body weight) on intake and growth rate of the animals; and digestibility of maize stover, sweet potato forage and their mixture were determined using a randomized complete block and completely randomized design, respectively. The dry matter (DM) intake and growth rate of the animals improved significantly (P < 0.01) with increasing level of sweet potato forage in the diet. DM intake was highest at the highest level (3% BW) of sweet potato inclusion and was 140% of the sole maize stover diet. Growth rate of animals at 3% (BW) level of sweet potato supplementation was 195% better than that of animals on sole maize stover. Digestibility of sheep diet improved significantly (P < 0.05) when sweet potato forage formed whole or part of the diet. Addition of sweet potato forage to a basal diet of maize stover improved animal productivity from this fibrous crop residue.Item Sweet potato production, utilisation and marketing in Nigeria(The International Potato Center (CIP), Apartado 1558, Lima 12, Peru, and the University of Ibadan, Oyo State, Nigeria, 2003-06) Tewe, O. O.; Ojeniyi, F. E.; Abu, O. A.Item Protein enrichment of sweet potato by solid state fermentation using four mono-culture fungi(Biotechnology Society of Nigeria, 1999) Abu, O. A.; Oguntimein, G. B.; Tewe, O. O.Washed, sliced and oven-dried whole sweet potato tubers (Ipomoea batatas) of the local variety were milled and supplemented with a mineral salts solution containing (g litre-1) glucose, 5; (NH4)2 SO4 1.5; KH2 PO4, 1.5; MgSO4 0.05;Yeast extract, 0.05 and fermented at 30ₒC for 72 hr by solid state fermentation (SSF) using Neurospora sitophila, Aspergillus niger, Candida utilis and Saccharomyces uvarum. At the end of the fermentation period A. niger gave the highest protein content of 11.8%, DM basis while S. uvarum showed the least protein content. However in terms of true protein production N sitophila gave the best value of 8.98%. While S. uvarum gave the least value under the Standard condition.Item The role of sweet potato in livestock farming in Nigeria(Sweet Potato Group (SPG), 2008-09) Abu, O. A.; Tewe, O. O.Item Solid-state fermentation of sweet potato using two monoculture fungi: changes in protein, fatty acid and mineral composition(1997-09) Abu, O. A.; Losel, D. M.; Tewe, O. O.This study evaluated the protein fatty acid and mineral changes in sweet potato root heal inoculated with two selected fungi by solid state fermentation procedure. The total protein content was raised from 4.95% to 11.83% and 6.69% within 48 hrs for Aspergillus oryzae and Aspergillus niger respectively. The total lipid dropped from 1.93% in the control to 1.36 and 4.19% for A. niger and A. oryzae respectively. The fatty acids C16:0 andC18:2 were preponderant over other fatty acids with A. niger and A. oryzae recording 18.94 and 28.17% for 06:0 and 43.20 and 37.88% for C18:2 respectively. The ash content values were 3.53% for the control, 3.54 and 4.51% for A. niger and A. oryzae respectively. The mineral changes analysed were for Calcium. Potassium, Iran. Manganese, Sodium, Zinc and Phosphorus. The pH changed from 5.26 for the control to 3.80 and 5.39 for A: niger and A oryzae respectivelyItem Nutritive potential of sweet potatoes peel meal and root replacement value for maize in diets of African catfish (Clarias gariepinus) advanced fry(Scientific Research Public Company, 2006) Olukunle, O.This study was carried out to evaluate the potential of Sweet Potato Peel (SPP) meal as a cheaper replacement for maize in the diet of Clarias gariepinus. Triplicate groups of 20 fish per plastic tank with average weight of 0.64±0.1 g per fish were fed four (4) diets, which were formulated to contain graded levels of sweet potato peel meal replacing 0, 25, 50 and 75 % of maize. The feeding trial lasted 6 weeks. The results showed that the diets did not significantly (p<0.05) affect fish performance within the treatments. Percentage Weight Gain (PWG) was 101.54% in fish fed with the control diet (0% sweet potato peel meal). The highest (PWG) of 150.77% was recorded in fish fed diets containing 25% sweet potato peel meal followed by a consistent decrease in PWG with increasing inclusion of sweet potato peels meal. However, diets containing 25, 50 and 75% SPP meal performed better than the control experiment with PWG of 150.77, 132.31 and 127.6%, respectively. The highest Feed Conversion Efficiency (FCE) was observed in the diet containing 25% SPP meal. A steady decrease in FCE was observed with increasing inclusion of SPP meal at 50 and 75%. Meanwhile, all the diets with SPP meal inclusion performed better than the control diet containing 0% SPP. The data indicated that Clarias gariepinus effectively tolerated diets containing sweet potato peel meal at low levels of concentration while fish growth performance and utilization decreased with increase in the sweet potato peel meal inclusion. The SPP meal based diets were cheaper than the control diet. The consequent better FCE and PWG of fish fed SPP diets showed that cost can be reduced while maintaining a high yield.Item Constraints to production, processing and marketing of sweet-potato in selected communities in Offa Local Government Area, Kwara State Nigeria(Kalma-Raj, 2007) Fawole, O. P.Offa Local Government Area is one of the major sweet-potato growing areas of Nigeria. Sweet potato is grown mainly on smallholder farms and concentrated particularly in communities in Offa Local Government Area. This study randomly selected 90 small scale farmers purposively from 9 communities to investigate constraints to production, processing and marketing of sweet-potato. Data were collected using an interview schedule. Results indicated that yields of 4-7 tonnes per hectare obtained by smallholder farmers are about 20-35 percent of the crop's potential yield. Reasons for this low output are limited cultivated land, lack of improved practices, poor storage facilities, lack of credit facilities, lack of extension training, poor transportation and high cost of input. Also, marketing of the crop is dominated by middlemen, to whom most of the profit accrue, thereby serving as a disincentive to the smallholder farmers. There is, therefore, a need for adoption of improved production techniques, development of appropriate and affordable storage and processing technologies, more efficient distribution and marketing systems and an effective extension service to improve current sweet-potato production in Nigeria.