Threshing is one of the most critical parts of post-harvest operation which affects the quality and quantity of maize production.It could be done manually or mechanically.However,the objective of this study was to eva...Threshing is one of the most critical parts of post-harvest operation which affects the quality and quantity of maize production.It could be done manually or mechanically.However,the objective of this study was to evaluate the performance of a maize cob thresher fabricated at National Centre for Agricultural Mechanization(NCAM)Ilorin at three different moisture contents and analyze the result using ANOVA and bar chart as statistical tools.The average values of parameters evaluated at three different stages of moisture content(15.81%,16.79%and 17.10%)of maize cob are as follow:threshing capacity 754.20,737.38 and 720.23 kg/h;threshing efficiency 99.73%,99.63%and 99.16%;cleaning efficiency 89.82%,89.45%and 88.34%;broken grains ratio 0.84%,0.79%and 0.70%;time taken 43,44 and 45 s,respectively.The total amount of maize cob fed into the machine was 9 kg in three replicates for each of the moisture content and the average values of threshed maize of 8.08,8.05 and 7.95 kg was recovered,respectively.There was significant difference in threshing efficiency,amount of chaffs in the threshed maize and the percentage broken ration.At 17.10%moisture content,the percentage broken grain ratio was minimal.At high moisture content,more force,energy and time is required to thresh certain amount of maize cob.Also,at minimal moisture content less force and energy is required for maximum output.Therefore,considering the previous work on performance evaluation of maize cob thresher,this machine performed satisfactorily and is far better than manual method.The machine is effective,efficient,affordable and available for the small and medium scale farmers in Nigeria.展开更多
The study examined the impact of using power tiller as a means of mechanizing lowland rice production in Nigeria. The study was carried out in Bida area, Niger State, where the sawah rice production was disseminated b...The study examined the impact of using power tiller as a means of mechanizing lowland rice production in Nigeria. The study was carried out in Bida area, Niger State, where the sawah rice production was disseminated by Watershed Initiative in Nigeria （WIN）. And in Ajase Ipo of Kwara State, some of the parameters assessed during the study included average speed of operation, average wheel slip/travel reduction, average draught of implement, and fuel consumption. The cost of operation and yield over five years of usage at Niger State and two years in Kwara State was determined and it was therefore concluded that the power tiller is the most appropriate field machinery for tillage operations such as puddling, leveling on lowland rice production in Nigeria.展开更多
Groundnuts marketed from farms are generally referred to as groundnuts in-shell. When freshly harvested, they may contain some dirt, vines and other foreign materials. Grades of these stocks are established based on i...Groundnuts marketed from farms are generally referred to as groundnuts in-shell. When freshly harvested, they may contain some dirt, vines and other foreign materials. Grades of these stocks are established based on intended use. Groundnut producers and commercial buyers use the grade as guidelines for trading. Grading aims at raising the quality and value of the product. Grading is generally limited to measurement of physical properties, such as, size distributions of the pods and percentage by weight of shelled kernels in the undecorticated groundnuts and percentage by weight of foreign materials. A groundnut grader was designed and developed. It was designed to sort three selected groundnut varieties commonly cultivated in Nigeria into three grades based on the geometric dimensions of the selected varieties. These varieties are SAMNUT 10, 14 and 18.Analyses of grading trials indicate that while SAMNUT 10 exhibits the three grades, the other varieties (SAMNUT 14 and 18) can only be graded into two grades. The grader has a rated capacity of grading 224 th-1 of undercorticated pods. The maximum ranges within each grade when all the varieties were considered were: grade I—15.81 mm to 18.05 mm, grade II—12.44 mm to 15.78 mm and grade III—10.60 mm to 13.30 mm.展开更多
文摘Threshing is one of the most critical parts of post-harvest operation which affects the quality and quantity of maize production.It could be done manually or mechanically.However,the objective of this study was to evaluate the performance of a maize cob thresher fabricated at National Centre for Agricultural Mechanization(NCAM)Ilorin at three different moisture contents and analyze the result using ANOVA and bar chart as statistical tools.The average values of parameters evaluated at three different stages of moisture content(15.81%,16.79%and 17.10%)of maize cob are as follow:threshing capacity 754.20,737.38 and 720.23 kg/h;threshing efficiency 99.73%,99.63%and 99.16%;cleaning efficiency 89.82%,89.45%and 88.34%;broken grains ratio 0.84%,0.79%and 0.70%;time taken 43,44 and 45 s,respectively.The total amount of maize cob fed into the machine was 9 kg in three replicates for each of the moisture content and the average values of threshed maize of 8.08,8.05 and 7.95 kg was recovered,respectively.There was significant difference in threshing efficiency,amount of chaffs in the threshed maize and the percentage broken ration.At 17.10%moisture content,the percentage broken grain ratio was minimal.At high moisture content,more force,energy and time is required to thresh certain amount of maize cob.Also,at minimal moisture content less force and energy is required for maximum output.Therefore,considering the previous work on performance evaluation of maize cob thresher,this machine performed satisfactorily and is far better than manual method.The machine is effective,efficient,affordable and available for the small and medium scale farmers in Nigeria.
文摘The study examined the impact of using power tiller as a means of mechanizing lowland rice production in Nigeria. The study was carried out in Bida area, Niger State, where the sawah rice production was disseminated by Watershed Initiative in Nigeria （WIN）. And in Ajase Ipo of Kwara State, some of the parameters assessed during the study included average speed of operation, average wheel slip/travel reduction, average draught of implement, and fuel consumption. The cost of operation and yield over five years of usage at Niger State and two years in Kwara State was determined and it was therefore concluded that the power tiller is the most appropriate field machinery for tillage operations such as puddling, leveling on lowland rice production in Nigeria.
文摘Groundnuts marketed from farms are generally referred to as groundnuts in-shell. When freshly harvested, they may contain some dirt, vines and other foreign materials. Grades of these stocks are established based on intended use. Groundnut producers and commercial buyers use the grade as guidelines for trading. Grading aims at raising the quality and value of the product. Grading is generally limited to measurement of physical properties, such as, size distributions of the pods and percentage by weight of shelled kernels in the undecorticated groundnuts and percentage by weight of foreign materials. A groundnut grader was designed and developed. It was designed to sort three selected groundnut varieties commonly cultivated in Nigeria into three grades based on the geometric dimensions of the selected varieties. These varieties are SAMNUT 10, 14 and 18.Analyses of grading trials indicate that while SAMNUT 10 exhibits the three grades, the other varieties (SAMNUT 14 and 18) can only be graded into two grades. The grader has a rated capacity of grading 224 th-1 of undercorticated pods. The maximum ranges within each grade when all the varieties were considered were: grade I—15.81 mm to 18.05 mm, grade II—12.44 mm to 15.78 mm and grade III—10.60 mm to 13.30 mm.
