Comparative study between some different combine sizes in

1.the result of study is Comparing the performance of three different combines (yanmar combine -1.45 m width, local combine -2.1 m width and claas combine -4.5 m width) in terms of harvesting time, grain losses, fuel consumption, energy and cost requirements.2. Estimating optimum combine size (optimum combination of combine width and power) suits for a certain unit plot area during the harvesting operation of rice crop.3. selecting optimum conditions (combine forward speed and grain moisture content) during the harvesting operation