Rufus Giwa Polytechnic

Owo, Nigeria

Rufus Giwa Polytechnic

Owo, Nigeria

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Agbede T.M.,Rufus Giwa Polytechnic | Adekiya A.O.,Federal University of Technology Akurre
Emirates Journal of Food and Agriculture | Year: 2012

The data on poultry manure (PM), wood ash (WA) and NPK fertilizer are needed to identify strategies for sustainable management of a degraded Alfisol for improving agronomic productivity. Hence field experiments were conducted at Owo in the forest-savanna transition zone of southwest Nigeria to study the effects of organic amendments and NPK fertilizer on the soil chemical properties, leaf nutrient concentrations, growth and pod yield of okra. Seven treatments considered in 2006, 2007 and 2008 were control (no manure/fertilizer), 5.0 t ha-1 PM, 10.0 t ha-1 PM, 5.0 t hav WA, 10.0 t ha-1 WA, 5.0 t ha-1 PM + 5. 0 t ha-1 WA and NPK 15-15-15 (200 kg ha-1) fertilizer. The treatments were laid out in a randomized complete block design with three replications. Organic amendments (PM and WA) improved soil organic C, N, P, K, Ca and Mg and leaf N, P, K, Ca and Mg concentrations, growth and yield of okra compared with the control. NPK 15-15-15 fertilizer increased soil N, P and K, but did not increase soil organic C, Ca and Mg and leaf Ca and Mg of okra. Combined application of 5.0 t ha-1 PM + 5.0 t ha-1 WA mostly improved leaf and soil N, P, K, Ca and Mg and soil organic C, growth and okra yield compared with other treatments. The superior performance of 5.0 t ha-1 PM + 5.0 t ha-1 WA was adduced to increased availability of nutrients following the inclusion of PM which aided faster decomposition and release of nutrients. Relative to the control, using the mean of the 3 years, 5.0 t ha-1 WA, 5.0 t ha-1 PM, NPK fertilizer, 5.0 t ha-1 PM + 5.0 t ha-1 WA, 10.0 t ha-1 WA and 10.0 t ha-1 PM increases pod yield by 23, 64, 68, 255, 41 and 123%, respectively. Combined use of PM and WA is recommended for ameliorating degraded Alfisol of southwest Nigeria and also reduced the quantities of PM and WA required for soil fertility maintenance.


Fatuase A.I.,Rufus Giwa Polytechnic
Theoretical and Applied Climatology | Year: 2016

This paper examines the likely perceived causes of climate change, adaptation strategies employed and technical inefficiency of arable crop farmers in Ondo State, Nigeria. Data were obtained from primary sources using a set of structured questionnaire assisted with interview schedule. Multistage sampling technique was used. Data were analyzed using the following: descriptive statistics and the stochastic frontier production function. The findings showed that majority of the respondents (59.1 %) still believed that climate change is a natural phenomenon that is beyond man’s power to abate while industrial release, improper sewage disposal, fossil fuel use, deforestation and bush burning were perceived as the most human factors that influence climate change by the category that chose human activities (40.9 %) as the main causes of climate change. The main employed adaptation strategies by the farmers were mixed cropping, planting early matured crop, planting of resistant crops and use of agrochemicals. The arable crop farmers were relatively technically efficient with about 53 % of them having technical efficiency above the average of 0.784 for the study area. The study observed that education, adaptation, perception, climate information and farming experience were statistically significant in decreasing inefficiency of arable crop production. Therefore, advocacy on climate change and its adaptation strategies should be intensified in the study area. © 2016 Springer-Verlag Wien


Ojeniyi S.O.,Federal University of Technology Akurre | Odedina S.A.,Federal University of Technology Akurre | Agbede T.M.,Rufus Giwa Polytechnic
Emirates Journal of Food and Agriculture | Year: 2012

In the present investigation, soils fallowed to Mexican sunflower (Tithonia diversifolia), siam weed (Chromolaena odorata), spear grass (Imperata cylindrica) and soil cropped to cassava were chemically analysed. Soil physical properties such as bulk density, total porosity and moisture content were also determined. The soils were also used to grow maize in screen house. Soils fallowed to Tithonia and Chromolaena had higher mineral values like nitrogen, phosphorus, potassium, calcium, magnesium and also organic matter. The plant morphological paramters like maize height, girth and leaf area were also found higher than cropped land and soil fallowed to spear grass. Soils under Tithonia and Chromolaena had more favorable physical properties compared with soils under cassava and spear grass as indicated by lower bulk density and higher total porosity. This can be adduced to the ability of the Tithonia and Chromolaena weeds to protect the soil, proliferate surface soil with their roots, and attract fungi, increase biomass and organic matter.


Ibrahim T.A.,Rufus Giwa Polytechnic | Dada I.B.O.,UK Defence Science and Technology Laboratory | Adejare R.A.,Abeokuta Federal University of Agriculture
Electronic Journal of Environmental, Agricultural and Food Chemistry | Year: 2010

The ethanolic extracts and essential oils of nutmeg seeds and ginger roots were examined for their phytochemical and physicochemical properties comparatively. Qualitative phytochemical screening of the ethanolic extracts of both spices showed the presence of bioactive principles such as alkaloids, tannins, glycosides, saponins, steroids, flavonoids, reducing compounds and terpeniods contributing to the biological activities of the extracts. The presence of tannin, glycoside and terpeniods were more in the ethanolic extracts of ginger's roots while steroids and reducing compounds were absent in both spices. Physicochemically, the essential oils from the spices were both liquid at room temperature, specifics gravity of 0.868 and 0.866 for nutmeg seeds and ginger roots respectively. The peroxide value (mg02/g) was higher in the nutmeg oil (3.35) than in ginger (2.63) while the iodine value (mgKOH/g) 151.92 and saponification values (mgKOH/g) 188.13 were higher in the ginger oil than the nutmeg oil of 126.4 and 162.4 respectively. The results of this work showed that the essential oil could found usefulness in food, beverages, pharmaceutical and chemical industries.


Adetuyi F.O.,Rufus Giwa Polytechnic | Lola A.,Rufus Giwa Polytechnic
Electronic Journal of Environmental, Agricultural and Food Chemistry | Year: 2010

The starch yield, physicochemical and amylose content of plantain starch as affected by waxing method of preservation of plantain (Musa paradisiaca Linn) were investigated. The percentage yield of plantain starch was 16.7%; it has a low foaming capacity of 4.1%. The water absorption and oil absorption capacities of plantain starch were 145% g/g and 138.5% g/g. It has a low bulk density of 0.417g/ml and amylose content of 14.22%. The starch yield, physicochemical and amylose content of waxed plantain (WSB and WPW) were significantly (P>0.05) higher than the unwaxed plantain (UW) at the end of the storage period except the Least gelation concentration. It was also observed that there was no significant (P>0.05) difference in the starch yield and the physicochemical properties of the waxed samples. Ripening was found to have caused the reduction in the starch yield and the physicochemical properties with the exception of bulk density because the unwaxed samples ripened in storage earlier than the waxed samples. Ripening of plantain should be prevented in order to maximize the plantain starch yield and its physicochemical properties.


Adetuyi F.O.,Rufus Giwa Polytechnic | Adelabu H.A.,Rufus Giwa Polytechnic
Malaysian Journal of Nutrition | Year: 2011

Introduction: In Nigeria, nursing mothers are advised to give their infants plantain flour paste 'amala ogede' with 'ewedu' Corchorus olitorius soup during the process of weaning. Over-matured okra is typically discarded resulting in substantial post-harvest waste; the seed could be processed into okra seed flour for the fortification of plantain flour. The aim of this study is to evaluate the effect of the addition of okra seed flour on the nutrients, functional properties, minerals and zinc bioavailability of plantain flour. Methods: Okra seed flour was used to fortify plantain flour in the ratio 90:10, 80:20 and 70:30. Results: The addition of okra seed flour to the plantain flour resulted in a significant increase in the protein, fat, fibre and ash content of the fortified plantain flour, while that of moisture and carbohydrate decreased. The mineral levels of Zn, K and Fe increased significantly while the calcium content decreased. The calculated phytate - zinc molar ratio and [Ca][Phytate]/[Zn] molar ratio of the fortified plantain flour were below the critical levels. Conclusion: The study showed that fortifying plantain flour with okra seed flour resulted in an increase in several nutrients, rendering the zinc more bioavailable. This fortified food has potential as a complimentary food in Nigeria.


Longe O.M.,Rufus Giwa Polytechnic
3rd IEEE International Conference on Adaptive Science and Technology, ICAST 2011, Proceedings | Year: 2011

A major element in Global System for Mobile Communication (GSM) system is the splitting of the system into cells to enhance frequency reuse and efficient coverage. As the mobile station moves from the coverage area of one cell to another, the first connection is broken and a new one is made without any interruption in service, in a process called handover. If this critical process is performed incorrectly handover can result in loss of the call. All the Base Transceiver Stations (BTSs) of the four providers of GSM service in Owo were located on the physical map of Owo town in Ondo State, Nigeria and coverage of each network provider was investigated. GSM signal strength analyzer was used for measuring and monitoring the received signal strength and Bit Error Rate (BER) from each BTS at six geographical locations in the town for a period of time. The effect of signal strength on handover decisions between cells within the same Base Station Controller (BSC) of same networks in Owo was assessed for each provider. © 2011 IEEE.


Adekiya A.O.,Federal University of Technology Akurre | Ojeniyi S.O.,Federal University of Technology Akurre | Agbede T.M.,Rufus Giwa Polytechnic
Experimental Agriculture | Year: 2011

Experimental data on tillage requirement of cocoyam (Xanthosoma sagittifolium) are needed to identify the most suitable tillage methods for managing the fragile Alfisols of the humid tropics to ensure sustained productivity. Hence, five tillage methods were compared as to their effects on soil physical and chemical properties, and growth and yield of cocoyam on an Alfisol at Owo in the forest-savanna transition zone of southwest Nigeria. The experiment consisted of five tillage methods: manual clearing (MC), manual ridging (MR), manual mounding (MM), ploughing + harrowing (P + H) and ploughing + harrowing twice (P + 2 H) were used for three years at two sites in a randomized complete block design with three replications. In the first two years (2007 and 2008), P + H produced the least soil bulk density and highest growth and yield, whereas in the third year (2009), MC produced the lowest soil bulk density and best performance of cocoyam. Manual clearing produced the best values of soil chemical properties in 2008 and 2009. Averaged over the three years, P + H, MR and MM had lower soil bulk density hence better growth and yield compared with P + 2 H and MC. Over the three years MC, MM, MR and P + H increased cocoyam cormel yield by 10, 21, 23 and 32%, respectively, over P + 2 H.The corresponding increases in corm yield were 7, 15, 13 and 21%, respectively. The multiple regressions revealed that bulk density and moisture content significantly influenced the yield of cocoyam. Soil chemical properties were not significant. Bulk density rather than soil chemical properties dictated the performance of cocoyam in an Alfisol of southwest Nigeria. Soil quality was degraded by P + 2H. For small farms, either MR or MM is recommended while P + H is recommended for large-scale farming of cocoyam. © Cambridge University Press 2011.


Agbede T.M.,Rufus Giwa Polytechnic | Adekiya A.O.,Federal University of Technology Akurre | Ogeh J.S.,University of Benin
Archives of Agronomy and Soil Science | Year: 2014

Plant materials differ in their chemical composition, rate of decomposition and suitability as mulch materials. Experiments were conducted during 2006-2007 and 2007-2008 cropping seasons for early yam cultivation at Owo in the forest-savanna transition zone of southwest Nigeria to study the effect of Chromolaena odorata and Tithonia diversifolia mulches applied at 0.0, 5.0, 7.5, 10.0 and 12.5 t ha-1 on soil chemical properties, leaf nutrient composition, growth and tuber yield of white yam (Dioscorea rotundata Poir). Both C. odorata and T. diversifolia mulches reduced soil bulk density and temperature; increased concentrations of soil organic matter (SOM), total N, available P, exchangeable K, Ca and Mg, leaf N, P, K, Ca and Mg; enhanced growth and yield of yam compared with control. The values of SOM, total N and available P and leaf N and P concentrations increased with increasing mulch rate. C. odorata mulch and T. diversifolia mulch applied at 10.0 and 7.5 t ha-1, respectively, was found to be suitable for yam production. T. diversifolia mulch compared with C. odorata mulch produced higher values of soil chemical properties, leaf nutrient concentrations, growth and yield of yam. T. diversifolia mulch produced 19% and 18% higher tuber yield compared with C. odorata mulch during 2006-2007 and 2007-2008 cropping seasons, respectively. © 2013 © Taylor & Francis.


Tillage and fertilizer influenced soil characteristics through their effects on soil properties which in turn affect crop performance. Field experiments were conducted during 2006 and 2007 cropping seasons on an Alfisol (Oxic Tropuldalf) at Owo in the forest-savanna transition zone of Nigeria to evaluate the effect of tillage and fertilizer types on soil properties and sweet potato yield (Ipomoea batatas L.). Two tillage treatments namely: zero tillage (ZT) and conventional tillage (CT) were combined with each of NPK-15-15-15 fertilizer at 250kgha-1, poultry manure (PM) at 10tha-1, combined application of 125kgha-1 NPK 15-15-15 fertilizer+5tha-1 poultry manure and a control (no fertilizer/manure). The experiment was laid out on a randomized complete block design in a factorial combination of eight treatments that were replicated three times. The surface soil (0-15cm depth) was chemically analysed before and after crop harvest and some selected soil physical properties, leaf nutrient concentrations, growth and sweet potato yield were determined. Conventional tillage plots had significantly lower soil bulk density (1.30Mgm-3) than zero tillage plots and resulted in higher leaf N, P, K, Ca and Mg and tuber yield of sweet potato compared with zero tillage. Soil water content was higher, whereas temperature was lower, in zero tillage than conventional tillage. Zero tillage had significantly higher concentrations of soil pH, organic C, N, P, K, Ca and Mg for surface soil (0-15cm depth). Conventional tillage increased mean tuber yield of sweet potato by 30% compared with planting on untilled zero soil. Application of poultry manure alone and complementary application of NPK fertilizer and poultry manure reduced bulk density and temperature and increased soil water content and porosity, whereas NPK fertilizer did not improve soil physical properties. Compared with control, poultry manure alone, NPK fertilizer alone and complementary application of NPK fertilizer and poultry manure increased soil total N, available P, and exchangeable K, Ca and Mg concentrations as well as leaf N, P, K, Ca and Mg concentrations. Poultry manure tended to improve soil pH, SOC, N, Ca and Mg compared with NPK fertilizer. Combined application of sub-optimal rates of NPK fertilizer and poultry manure gave higher soil and leaf N, P and K concentrations, vine length, vine girth, leaf area and tuber yield compared with NPK fertilizer or poultry manure alone. Compared with control, NPK fertilizer, poultry manure and NPK fertilizer plus poultry manure increased tuber yield by 39, 45 and 83%, respectively. Conventional tillage in combination with NPK fertilizer plus poultry manure gave the highest tuber yield of sweet potato. © 2010 Elsevier B.V.

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