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| Registros recuperados: 260 | |
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| Farias, Thiago Palhares; Trochmann, Andre; Soares, Bruno Lima; Moreira, Fatima Maria Souza. |
| The objetives of the study were to evaluate the agronomic efficiency of strains approved as inoculants for cowpea and of three new strains under selection, as well as to evaluate the influence of liming on the symbiosis and productivity. Two field experiments were conducted using cowpea (BRS Guariba) from June to September 2013. In the first experiment, a completely randomized block experimental design was used, with four replicates and seven treatments (INPA03-11B, UFLA03-84, UFLA03-153, UFLA03-154, UFLA03-164 and two controls). In the second experiment, a 7 x 2 factorial design was used, with the above described treatments being the first factor and liming as the second factor. Parameters evaluated were: nodule dry matter, shoot dry matter, shoot N... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Microbiologia e Bioquímica do Solo 5.00.00.00-4 Vigna unguiculata; Bradyrhizobium; Acidity tolerance; Efficiency; Production system; Biology nitrogen fixation Microbiologia e Bioquímica do Solo. |
| Ano: 2016 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/28630 |
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| Rufino, Marcelo de Oliveira Alves; Universidade Federal do Piauí; Alves, Arnaud Azevedo; Universidade Federal do Piauí; Rodrigues, Marcônio Martins; Universidade Federal do Piauí; Moura, Raniel Lustosa; Universidade Federal do Piauí; Cavalcante, Ana Clara Rodrigues; Empresa Brasileira de Pesquisa Agropecuária; Rogério, Marcos Cláudio Pinheiro; Empresa Brasileira de Pesquisa Agropecuária. |
| It was evaluated the production and quality of milk produced by goats grazing Panicum maximum Jacq cv. Tanzania (Guineagrass) and receiving four levels of concentrate supplementation. Eight Anglo Nubian goats, aged between two and four years, 43.6 kg in average body weight and between the 2nd and 4th lactation were distributed into two 4 x 4 balanced Latin square design. The supplementation levels were: 0.0, 0.5, 1.0 and 1.5% of body weight. The concentrate was composed of corn and soybean meal. The intake of dry matter and nutrients, and the daily production of milk, 4% fat-corrected milk, fat, protein, lactose and total solids had increased (p < 0.05) with supplementation, whereas fat and total solids percentage were reduced (p < 0.05). The... |
| Tipo: Pesquisa de campo; análise laboratorial |
Palavras-chave: 5.04.05.00-4 Anglo Nubian breed; Intake; Efficiency; Fat. |
| Ano: 2012 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/14339 |
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| Amponsah, Shadrack Kwadwo; Sheriff, J Thajudhin; Byju, Gangadharan. |
| Abstract: In India, cassava is consumed as a secondary staple along with the main staple, rice, and many rural poor consume it as the staple in different forms of preparations. Though harvesting is known to be one of the most difficult and cost-intensive field operation in cassava cultivation, mechanisation of cassava harvesting is still very low in most cassava growing areas of India due to topographic constraints, methods and scale of cultivation. The most viable solution to overcome these constraints is to promote the use of more efficient manual harvesting tools. Thus, the main objective of this study was to field evaluate the efficiency of four manual cassava harvesting techniques under different land preparation methods in terms of field capacity,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Farm power and machinery; Agronomy cassava; Field capacity; Drudgery; Coppiced; Efficiency. |
| Ano: 2014 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2793 |
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| Adisa, Alex Folami; Udo, Sunday Bassey; Ismaila, Salami Olasunkanmi; Adejuyigbe, Samuel Babatunde. |
| Common traditional techniques of breaking palm kernel nuts in rural areas where it is produced involved a lots of drudgery and hazard. The goal of this research work was to design, construct and test the performance of a palm kernel nut cracking machine for local use at affordable cost. Samples were test-ran, cracked and replicated at different shaft speeds (r/min). with developed machine. The results showed that the un-cracked nuts were 2.50%, 2.00%, 1.50%, 1.25% and 1.00 %, the partially cracked were 2.75%, 2.75%, 2.25%, 2.00% and 1.75 %, the un-broken kernels were 93%, 94%, 95%, 94.5% and 94 %, that of broken kernels were 1.75%, 1.50%, 1.50%, 2.50% and 3.25 % at set speeds of 800, 1200, 1600, 2000 and 2400 r/min respectively. The throughput of the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Farm Machinery; Post harvest crop processing and storage performance; Throughput; Cracking; Palm kernel nut; Efficiency. |
| Ano: 2015 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3417 |
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| HUDA, MD. NAZMUL. |
| AbstractGrading potatoes by size is an important operation for preparing tubers for seed and for commercial purposes. If potatoes were sold after grading, this would be beneficial to both producers and consumers. Since mechanical graders are not locally available, potatoes are graded, when necessary, by hand. This is a time consuming, costly, and inefficient method. This work concerns the development of a potato-grading machine for small-scale farmers. The grader consisted of a hopper, grading unit, prime mover and catchment tray fitted on a frame. The grader was made of locally available materials to keep the cost low. The grading unit was made up of plastic oil container, hopper and catchment tray made up of mild steel sheet and the frame was made up of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Potato grading; Capacity; Power consumption; Efficiency; Damage tubers; Cost estimation.. |
| Ano: 2019 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5523 |
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| salako, yusuf adeshina. |
| This study evaluated a boiler designed for small scale palm fruit processing for its performance. The boiler was evaluated for its fuel consumption, steam production rate and efficiency using 100 kg of different fuel samples (shell, palm fibre, empty fruit bunch (efb) and wood) with known calorific value and their combinations for a period of 60 minutes firing time. The rate of fuel consumption by the furnace differs with the type of fuel materials as 100 kg of shell and 100 kg of wood burnt within 55 minutes firing time while the combination of shell and wood was burnt within 60 minutes of its firing time under the same condition. Combination of shell and efb lasted for 50 minutes during firing while efb alone burnt completely within 35 minutes. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fire-in-tube; Water-in-tube; Inlet air preheat chamber; Fuel material; Firing time; Efficiency. |
| Ano: 2014 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2723 |
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| Bagheri, Nikrooz -. |
| This research is carried out to predict energy efficiency of a solar dryer by adaptive neuro-fuzzy inference system (ANFIS) model. In this model, temperatures in the collector inlet, collector outlet and in the dry chamber exit and also absorbed heat energy by collector and necessary energy for evaporation of product moisture were considered as an ANFIS network inputs. To investigate the capability of ANFIS models in prediction of dryer efficiency, empirical model and regression analysis were used and their results were compared by ANFIS models. To evaluate an accuracy ANFIS models, statistical parameters such as mean absolute error, mean squared error, sum squared error, correlation coefficient (R) and probability (P) were calculated. Results indicated... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agricultural machinery solar drying; Efficiency; ANFIS; Empirical modeling.. |
| Ano: 2015 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2972 |
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| Anyanwu, Cosmas; Ibelegbu, Charity; Ugwu, Chinyere; Okonkwo, Valentine; Mgbemene, Chigbo. |
| This paper presents the design, construction and comparative performance evaluation a cereal slurry sieving machine. For the evaluation, wet slurries of maize, millet and sorghum were each sieved with three sieves of mesh sizes of 1.19 mm, 1.00 mm and 0.354 mm. The machine performed satisfactorily in the sieving of wet maize slurry, recording an efficiency of 85%. The output capacity was 22.07 kg/hr in comparison with 8.82 kg/hr achieved in the traditional manual method. The average sieving time for 1kg of maize slurry using the machine was about 2.5 times shorter than in manual sieving. The sieving capacity of the machine was about 2.4 times higher than that of the traditional manual method. The Analysis of Variance (ANOVA) carried out on the results... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cereal; Slurry; Machine design; Sieving capacity; Mesh size; Efficiency. |
| Ano: 2021 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5737 |
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| Ismail, Nahed Khairy. |
| This study was carried out, at Dept. of Agric. Eng., Faculty of Agric., Mansoura Univ., Egypt during 2014 spring season, to design and evaluate a cutting prototype performance and production as a date palm leaves components (fronds, leaflets and spines). The tested treatments include saw speed (167.5, 251.2, 334.9 and 418.7 rad s-1), saw teeth inner spacing (4, 5 and 8 mm) and feeding speed ratio (1:1, 1:1.25, 1:1.67 and 1:2.50). The study concluded that the optimum operation conditions of saw speed of 334.9 rad s-1, saw teeth inner spacing of 8 mm and 1:1.25 feeding speed ratio achieved cut fronds productivity of 1051.5 m h-1, cut leaflets and spines productivity of 183.86 kg h-1, cutting leaflets efficiency of 99.32%, leaflet losses of 0.68 %, frond... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agricultural Engineering-Bio-system Engineering Date palm leaves; Leaflet; Frond; Efficiency; Circle saw; Losses; Energy. |
| Ano: 2017 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4043 |
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| Alonge, A.F.. |
| This research work involves the design and fabrication of Irvingia nut cracking machines. It operates using impact technique which involves collision between the seednut and stationary wall. The procedures employed the design stage, fabrication and testing. The machine components are: impact drum, shaft, impeller (rotor), electric motor, driver and driven pulley and hopper. The cracking chamber consists of the impeller and impact drum. The seednuts were pre-treated before testing by sun-drying to improve its crackability. The machine gave a better performance at the speed of 2600 revolution per minute with average cracking efficiency, percentage kernel breakage and capacity of 88%, 17.5% and 916 nuts/hr. The improvement in the design can be achieved by... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Design; Construction; Irvingia gabonensis; Nut; Cracking; Efficiency. |
| Ano: 2015 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3086 |
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| BELLO, SEGUN RAPHAEL. |
| Performance evaluations of three coconut cracking devices was carried out and its results compared with the conventional (hand cracking technique) of hitting on hard surface. The three devices include a punch-split device, an impact-split device and hydraulic press split device which were developed at the Department of Agricultural & Bioenvironmental Engineering Technology, Federal College of Agriculture, Ishiagu. Each technique was evaluated for output capacity, cracking efficiency, ergonomics, and time required to crack a unit of different grades of coconut. The average cracking efficiency for punch split was 87.09 per cent with a range of 86.76 to 95.00 per cent, impact split efficiency varied from 83.33 to 95.00 per cent with the average of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coconut; Cracking; Impact; Hydraulic; Sphericity; Efficiency; Capacity; Roundness. |
| Ano: 2020 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5673 |
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| Ogundare, Adebayo; Ojolo, Sunday. |
| In this work, a variable size nut cracking machine has been designed and constructed to improve the efficiency of shelling operation of quite a number of nuts. The machine is designed to be adaptable to the cracking requirements of some number of nuts, whose shell can be processed to brittleness. The machine performs two operations, shelling of the nut and separation of the shell from the nut. The machine comprises of a hopper, rectangular box housing the cracking drum and compression plate, and a two stage agitated separating tray (to sort the nut from the shell), all supported by a frame. The cracking drum, which is driven by a v-belt connected to an electric motor, also provide the agitation to the separating tray via a v-belt connected a cam mounted... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mechanical Engineering; Manufacturing; Machinery Develoment Variable nut size; Cracking; Efficiency. |
| Ano: 2015 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3333 |
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| Adekanye, Timothy Adesoye; Osakpamwan, Adams Blessing; Osakpamwan, Adams Blessing; Osaivbie, Idahosa Endurance; Osaivbie, Idahosa Endurance. |
| A soybean threshing machine was designed, fabricated and evaluated at Landmark University, Omu-Aran, Kwara State, Nigeria, to determine its performance and ease the drudgery problems associated with threshing of soybean by the small scale farmers. Evaluation was carried out with TGX 1448 soybean variety at different levels of moisture contents; 10%, 16% and 22% (wet basis) and at different drum speeds; 320 r/min, 385 r/min, 450 r/min, 515 r/min, with constant mass input of 600g and constant concave clearance of 23 mm. The overall mean results obtained for performance indicators in terms of threshing efficiency, cleaning efficiency, percentage of damage seed, percentage of blown seeds, percentage of seed loss and throughput capacity were 99.51%, 77.91%,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agricultural Engineering / Crop Processing soybean; Threshing; Separation; Efficiency; Small scale farmers. |
| Ano: 2016 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3675 |
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| Yusuf, Oladimeji Usman. |
| Efficient use of energies on crop production helps to achieve increased production and productivity as well as profitability and competitiveness of agricultural sustainability of rural communities. The study examined profitability and energy used of rice production under two different technologies in two States of Nigeria. Primary data through structured questionnaire and interview were administered to 265 rice farmers comprising 57 semi-mechanized (Group 1) and 208 traditional (Group 2) rice farmers in both States. Results revealed that the semi-mechanized had higher income ₦370998.2 ($2348.1) per ha compared to ₦307031.1 ($1943.2) per ha from traditional technology. Group 1 farmers produce a total energy output 54842.8 MJ ha-1 (3.7 tons) compared to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Watermelon; Net energy; Efficiency; Net margin. |
| Ano: 2018 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4299 |
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| BELLO, SEGUN RAPHAEL. |
| The performance evaluation of a dual-function device for slicing and drying Okra developed at the Federal College of Agriculture, Ishiagu Nigeria was carried out and reported. The device was designed to slice and dry okra in one single-sequence operation. The physical characteristics of crop sample were investigated, characterised and processed in the device to determine their performance under steady state process conditions. The effects of the modified machine on crop processing were also investigated. The results shows that the mean equivalent diameters for each okra sample categorized as A, B and C are; 24. 54mm, 19.20mm and 15.79mm respectively. The slenderness ratios and sphericity determined for each of the three samples were; 3.04, 3.11, 2.79 and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agricultural engineering Okra; Slicing; Drying; Efficiency; Sphericity; Device. |
| Ano: 2020 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5670 |
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| UDOMSUP, JANYA. |
| This work presents a study for biomass possible to bring renewable energy in a swirling fluidized bed combustor (SFBC). The main objective of this experimental work was to study the biomass component and excess air of biomass. Palmyra palm shell, Leucaena (lam.), and Water hyacinth are using as fuel in the tests. Quartz sand of 600-850 µm and static bed height of 20 cm was used as inert bed material. For all of tests, the feed rate was fixed 45 kg/hr. for variable excess air (of 40 60 and 80%). As the experimental results, the temperature profiles in SFBC were obviously seen deviate when tests with higher excess air. In the test run, the highest cellulose (palmyra palm shell) for 80% excess air had CO and NO emissions were found in quite stable level (less... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biomass; Biomass Component; Efficiency; Emission; Fluidized-bed; Combustion; Swirling. |
| Ano: 2021 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5945 |
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| Registros recuperados: 260 | |
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