many factors affect yield loss in wheat harvesting with a grain combine harvester and there is no mathematical model to describe the behavior of this complex system. thus in this study, a fuzzy logic controller (flc) was designed, implemented and tested for the automatic settings of cylinder speed, concave clearance, fan speed and forward speed of a model 955 john deere combine. first, the mech...

it is very important to test and evaluate the performance and ability of new-design machinery in comparison with available ones. based on this, a tractor front-mounted rice reaper was compared and evaluated with tiller- mounted and self-propelled reapers. field experiments were conducted to determine forward speed, field capacity, harvesting losses, labor and costs. experiments were conducted b...

in conventional cultivation of sugar beet the weeding and crust breaking are mostly performed manually. the objectives of this research were to design, fabricate and evaluate a soil crust breaker and weeding implement equipped with a detecting sensor. each unit consisted of a distance detecting sensor and a hydro-motor for driving the blades and pneumatic valves for moving the blades. the hydro...

a paper-pot transplanter was designed, developed and evaluated in the field by transplanting sugar beet seedlings grown in paper pots. a ground-driven counter wheel equipped with an infra-red sensor measures the traveled distance and sends the corresponding signals to a micro-controller. a step motor controlled by the micro-controller turns the driving shaft of the paper-pot metering mechanism ...

introduction today, attention to safety and environmental issues in all sectors in agriculture, industry and services is very important. chemical poisons play an important role in rapid progress of agricultural products. every year about 25 to 35 percent of the world's crops are affected by insects, weeds and plant pathogens disappear and this figure would be raised to 80% if no control was app...