Ricegrains is one of the major staple food consumed by 70% of the world’spopulation. It occupies one fifth of the total land covered under cereal crops(Chakravarthi and Naravaneni, 2006). Rice, which is mainly, consumed as a wholegrain supplies 20% of daily calories for the world population. The adaptationof rice cultivars to wide climatic conditions has led to the development ofthousands of rice varieties having diverse quality features in terms ofphysical, cooking, eating and product development characteristics(Bhattacharya, 2005).Recently,rice harvesting became a problem for farmers due to shortage of labor andconsequently, the increase of wages in the country. With the advent of industrialization,there has been a migration of labor from the agriculture sector to theindustrial sector leaving limited numbers in the later sector to do the labor-intensivefarming activities like harvesting.Consequently,one type of mechanical equipment that has grown rapidly in popularity isCombine Harvesters. It is a technology that combines harvesting, threshing,cleaning, and in some instances, bagging, in one operation.
One series ofsurveys in the TKR showed that use of Combine Harvesters increased rapidlybetween 1996 and 2006 (from preliminary field study). Fully mechanizedharvesting systems have replaced the conventional systems using human labor withsickles in harvesting operations in TKR. The main advantage of mechanizesharvesting systems are reducing the production costs and improving labor efficiency.However, operating the combine harvesting machines has great potential to causenegative impacts to economic of farmers, especially social impacts.
Aclassic combine harvester as a universal machine may be adjusted also toharvesting of corn and soya (Przyby? and S?k, 2010). The next stage inadjusting the machine for harvesting of a particular crop was the change of theharvesting device and mounting relevant working elements of the combine suchas: elongation of a table and equipping it with vertical side scythes designedfor harvesting of rapeseed (?ak et al., 2007).Combineharvesters produced in recent years are advanced machines with regard tomechatronics. Operation parameters of harvesters are controlled by means ofsensors and proceeded by an on-board computer which automatically selectsworking settings, optimally to existing field conditions (Baruah, Panesar,2005a, 2005b; Nik et al., 2009; Tana?, Zagajski, 2008).
Due to the use of automaticcontrol system of working units, harvesters became more efficient. For example,moisture sensors, which were used in harvesters cause decrease of damage andgrain losses in the harvesting process (Liu, Leonard, 1993; Miu, Kutzbachb,2008a, 2008b; Tana? et al., 2008;Tana?, Zagajski, 2010; Molendowski et al.,2012).Somefarmers use manual labor to cut the crop and then use the combine harvester tothresh and clean it stationary, Other follow direct combining but withoutspecial rice grains header attachment, The crop is new and sensitive toharvesting time and therefore poor adjustment of the combine may lead to badperformance of the combine, therefore operators are essential to improve theefficiency of rice grains direct harvesting (less labor, less losses, highquality of grain and reasonable work rate). This will help the farmer for highproduction and good crop quality, which means high profit.