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- Burley tobacco (2)
- Analysis (1)
- Animal growth (1)
- Animal reproduction (1)
- CATCH (1)
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- Computer model (1)
- Coulter (1)
- Design (1)
- Dry matter (1)
- Dynamic simulation (1)
- Economic comparison (1)
- Economic constraints (1)
- Farm grain drying (1)
- Ground driven powered tillage (1)
- Harvesting practices (1)
- Harvesting strategies (1)
- Powered tillage blade (1)
- Ruminants (1)
- Stage of growth (1)
- Storage facilities (1)
- Tillage blade (1)
- Wind drag (1)
- Wind velocity (1)
Articles 1 - 6 of 6
Full-Text Articles in Engineering
Wind Drag On Burley Tobacco Plants, James H. Casada, Linus R. Walton, Larry G. Wells
Wind Drag On Burley Tobacco Plants, James H. Casada, Linus R. Walton, Larry G. Wells
Biosystems and Agricultural Engineering Faculty Publications
Drag coefficient and center of resistance to wind forces were determined for four varieties of burley tobacco at three stages of growth and using wind velocities ranging from about 3 to 17 m/s. Drag coefficients determined ranged from about 0.024 at the highest velocity to about 0.081 at the lowest velocity. Stage of growth and wind velocity had significant effects on drag coefficient. Variety did not have a significant effect on drag coefficient. Mean center of resistance varied from 42.3 percent of the distance from bottom leaf to top leaf at the early stage of growth to 71.2 percent at …
The Influence Of Harvesting Strategies And Economic Constraints On The Feasibility Of Farm Grain Drying And Storage Facilities, Otto J. Loewer Jr., Thomas C. Bridges, G. M. White, Douglas G. Overhults
The Influence Of Harvesting Strategies And Economic Constraints On The Feasibility Of Farm Grain Drying And Storage Facilities, Otto J. Loewer Jr., Thomas C. Bridges, G. M. White, Douglas G. Overhults
Biosystems and Agricultural Engineering Faculty Publications
The economic return to on-the-farm grain drying and storage facilities is influenced by many factors including harvesting strategies, facility management, market conditions, energy considerations, and facility design. This study evaluates the influence of these factors on expected net return.
Ground Driven Powered Tillage, Larry G. Wells, E. M. Smith, D. E. Hammett, H. J. Thompson Jr.
Ground Driven Powered Tillage, Larry G. Wells, E. M. Smith, D. E. Hammett, H. J. Thompson Jr.
Biosystems and Agricultural Engineering Faculty Publications
A ground driven powered tillage device is described which utilizes a passive rolling coulter propelled through the soil by a prime mover. The reaction torque imparted by the soil to the coulter is delivered via a torque transfer unit to a powered tillage blade. The tillage blade rotates counter to the direction of the passive rolling coulter and prepares a tilled furrow of some predetermined depth for seed placement and coverage.
Analysis is presented in which the torque developed by a passive rolling coulter engaging the soil is predicted. A relationship is presented for determining the velocity ratio between the …
Analysis And Testing Of Powered Tillage Blades, Larry G. Wells, E. M. Smith, D. E. Hammett
Analysis And Testing Of Powered Tillage Blades, Larry G. Wells, E. M. Smith, D. E. Hammett
Biosystems and Agricultural Engineering Faculty Publications
Fundamental design considerations for powered rotary tillage blades are presented and discussed. The relationship between blade angular velocity and the geometric dimensions of cutting edges is specified for tillage blades rotating counter to the direction of travel and assuming a typical forward speed for tillage.
Analyses showed that a powered blade rotated opposite to the direction of travel can be operated at relatively lower angular velocities than can one rotated in the direction of travel to achieve equivalent blade velocity and acceleration relative to the soil. Furthermore, a blade rotated opposite to the direction of travel requires relatively lower power …
Economic Comparison Of Alternative Burley Tobacco Harvesting Practices By Computer, Thomas C. Bridges, Larry G. Wells, George A. Duncan, John N. Walker
Economic Comparison Of Alternative Burley Tobacco Harvesting Practices By Computer, Thomas C. Bridges, Larry G. Wells, George A. Duncan, John N. Walker
Biosystems and Agricultural Engineering Faculty Publications
The computer model CATCH (Computer Analysis of Tobacco Cutting and Housing) was developed to provide the individual tobacco producer with management information concerning alternative methods of harvesting burley tobacco. CATCH utilizes specific producer in-puts to analyze 24 alternative burley production systems and presents up to four economic rankings containing costs, equipment and labor for each system. The economic rankings aid the producer in decision making with regard to his own operation.
Dynamic Simulation Of Animal Growth And Reproduction, Otto J. Loewer Jr., Edward M. Smith, Gerald Benock, Nelson Gay, Thomas C. Bridges, Larry G. Wells
Dynamic Simulation Of Animal Growth And Reproduction, Otto J. Loewer Jr., Edward M. Smith, Gerald Benock, Nelson Gay, Thomas C. Bridges, Larry G. Wells
Biosystems and Agricultural Engineering Faculty Publications
A rather unique systems analysis approach has been made to simulate the utilization of dry matter by ruminant animals, and the natural breeding and reproduction process within a herd. Physiological factors occurring over time and the time related effects of these factors are simulated.