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Articles by S.I. Manuwa
Total Records ( 4 ) for S.I. Manuwa
  S.I. Manuwa , O.O. Odubanjo , B.O. Malumi and S.G. Olofinkua
  Weed control is a major problem for peasant farmers in Nigeria. Majority of these farmers do control weed using hand tools like hoes and cutlasses and so on. Though, this method proves useful yet it is very demanding of labour and full of drudgery. This is further compounded by the low interest shown by the youth in agriculture in the last one-decade or so. To solve this problem, an engine powered row crop mechanical weeder was designed, fabricated and tested at the Federal University of Technology, Akure, Nigeria. The main features of the weeder were: a 5 hp Internal Combustion (IC) petrol engine as prime mover, power transmission system, three sets of weeding blades, main frame and ground wheels. The overall width, length and height of the weeder are: 0.32, 0.85 and 0.65 m, respectively. The width of cut of the machine was 0.24 m, while the speed of the cutting blades was 800 rpm. The average fuel consumption of the engine was 0.7 L h-1 at maximum speed. Field tests showed that under moist field condition, the weeding efficiency was 95% and effective weeding capacity was 0.053 ha h-1. The cost of producing the model weeder was estimated at about US$ 285 in 2007.
  S.I. Manuwa and M.O. Ogunlami
  Published data are scarce on soil bin experimentations and the design of soil engaging implements in Nigeria. In this study, three different model tillage blades Rectangular Flat Blade (REFB), Semi-Circular Flat Blade (SCFB) and Semi-Circular Concave Blade (SCCB) were considered. The blades each 25 cm wide and 12 cm height were tested in an indoor soil bin located in the Department of Agricultural Engineering at The Federal University of Technology, Akure, Nigeria. The experimental soil was Igbokoda loamy sand soil. The main objective of this study was to evaluate the draught requirements of the tillage blades and to evaluate and model the parameters of the soil profile produced under different operating conditions. The effects of tool shape, forward speed, rake angles (30 and 45°) and depth (50-150 mm) on draught force and soil disturbance were tested and evaluated. Results showed that draught increased with an increasing rate with depth of blade. Draught also increased with rake angle. The SCFB had the highest draught (450 N) followed by REFB while SCCB had the least draught (280 N). Draught force varied quadratically with tillage depth. The relationship was developed from multiple regression analysis with coefficient of determination >0.9990. Graphical representations of the relationships are also presented for the treatments considered. Soil profile patterns measured by a profilometer was analyzed using the following parameters maximum Width of Soil Throw (TDW), maximum Width of soil cut (Wfs), Ridge-to-Ridge Distance (RRD), height of ridge (hr), furrow depth (df) and tool width (w) were analyzed by multiple regression analysis. Generally, parameters of soil profile increased with increase in tool width and rake angle. The TDW was highest for SCFB followed by SCCB while REFB had the least value. The soil profile parameters were modeled for prediction purposes using regression analysis. The study provides relevant data in the design of soil engaging tools and sustainable crop production.
  S.I. Manuwa and H.A. Muhammad
  Some mechanical properties of Shea kernel were investigated in this study. The kernels were divided into two categories sizes namely, Small Size Kernel (SSK) and Large Size Kernel (LSK) and the properties investigated were rupture force, deformation at rupture and energy consumed at rupture. The tests were carried out at a deformation rate of 50 mm min-1 and four moisture content levels of 25.9, 11.60, 6.88 and 4.98% (db) for SSK and 11.19, 6.21, 5.78 and 2.77% (db) for LSK. The variations in these properties were observed considering the effects of moisture content and compression axes on them as the kernels were air-dried. Sample kernels were compressed along the orthogonal axes corresponding to major diameter (length), intermediate diameter (width) and minor diameter (thickness) of Shea kernel. Some physical characteristics of Shea kernel such as dimensions, geometric mean diameter and mass were also evaluated.
  S.I. Manuwa and A.A. Ajisafe
  The facility for teaching and research in the nations Universities has been overstretched due to the increase in students enrollment, obsolescence of equipment and unaffordable high cost of imported equipment due to improper funding of education. This has negatively affected teaching and research in engineering generally and agricultural engineering in particular and by extension, sustainable agricultural productivity. An attempt has been made at FUTA to develop indoor soil bin facility that enabled studies in soil-machinery systems and interaction. This study reports the development of an overhead gantry for the indoor soil bin using locally sourced materials. The gantry has enhanced the versatility of the indoor soil bin by saving time and labour (about 33%) required for soil preparation and experimentation. It has also created working space as equipment can be suspended in the air above the soil bin. The features of the overhead gantry are the stand, consisting of four legs; the runway; the rails; rack and pinion; reduction gear box; pulleys; chain hoist; electric motors (two) the trolley and the electrical system control unit.
 
 
 
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