Introduction
The requirement for correct planning regarding agricultural mechanization is sufficient recognition of the existing situation. In order to determine the existing situation and compare the mechanization status of each region with another region, there is a need for have been to fully defined and meaningful indicators and criteria. The consciousness of the current situation and the distance between each region obtaining the optimal level can be used to provide a suitable program and development of mechanization for finding and resolving the disturbances and inequalities. In this research, the indicators of rice mechanization in West cities of Guilan province were investigated and compared. From the data, the current state of mechanization of rice has been determined and the necessary solutions for their improvement have been provided.

Methodology
Guilan province is one of the northern provinces of Iran, with an area of 14711 square kilometers which stands the second ranking (31% of total) in terms of area harvested. A study was conducted during the years 2020 and 2021 for determination of indicators that govern the mechanization development in the western regions of Guilan province. The studied areas were as Shaft, Fuman, Masal, Astara, Somesara, Talesh, Rezwanshahr and Bandar-e Anzali with an area under rice cultivation of 97103 hectares, about 40.8% of rice cultivation in Guilan province.
A study was conducted in 2020 and 2021 to determine the indicators that determine the development of mechanization in the western areas of Guilan province. Collecting the required information and data was done by completing the questionnaire and by referring to the available statistical sources, field surveys and interviews with the users. The statistical population of this research was rice farmers in the western regions of the province. There were more than 75 thousand rice farmers working in these areas. The sample size was determined using Cochran's formula for rice farmers in the western regions of 385 farmers. The questionnaire consists of two parts: personal and professional characteristics of rice farmers and mechanization. The sampling method was multi-stage, after selecting the villages, sample people were randomly selected from each village. In the field of personal and professional characteristics of rice farmers, the variables included gender, age, literacy level, history of rice cultivation, type of cultivated rice, area of cultivated land, amounts of fertilizers and pesticides used, average size of plots, type of land ownership, and number of household members. In the mechanization characteristics section, the variables include the type of operation, the specifications of the machine used in the operation, the type of ownership of the machine, the start and end time of the operation, the number of times, the start and end date of the operation, and the number of manpower required to perform the operation. to collect information about; The cultivated area of rice varieties in the cities, self-driving machines and agricultural machines active in rice cultivation in each city, technical specifications of the agricultural machines used, the calendar of rice cultivation activities and rice yield in each city, from the statistics of reliable centers such as the Provincial Agricultural Jihad Organization (Department of Mechanized Technology Agriculture, Management of Agriculture Affairs and Department of Statistics and Information Technology and Network Equipment), Management of Agricultural Jihad of the cities, Service Centers of Agricultural Jihad and Rice Research Institute of the country were collected and also the statistics of crops of the Ministry of Agricultural Jihad were used.
From the obtained information, the mechanization indices including degree of mechanization, mechanization level, mechanization capacity, machine power, machine productivity level, mechanization economic efficiency and machine farm efficiency were calculated.
The results of this study showed that the degree of mechanization of tillage operations, planting with transplanter, spraying, weeding and harvesting (with rice reaper and combine) is 100, 75.06, 17.43, 6.86 and 81.60%, respectively. The highest level of mechanization related to Rezwanshahr city was obtained with 5.68 horsepower per hectare and the lowest for Shaft city with 1.75 horsepower per hectare. The lowest economic efficiency was calculated for Razvanshahr city with 0.51 and the highest for Shaft city with 1.51 tons per horsepower. The highest productivity coefficient related to the planting operation with a 6-row walk-behind planter and the lowest for the spraying operation with a motorized back sprayer are 76.70 and 4.10%, respectively. The average rice mechanization capacity in the western areas of Guilan province was 154.99 horsepower-hour per hectare. On average, in the western regions, per There was one tractor for 33 hectares, a tiller for every 5 hectares, a transplanter for every 27 hectares and a combine harvester for every 142 hectares.

Conclusion
The degree of mechanization for tillage and transplanting operations in the western regions of Guilan province demonstrated a good circumstance based on the sixth state plan of development. According to the expectations, by the end of the sixth plan, the degree of mechanization in harvesting operation in order to reach the expectations, there is a need to reinforce and import more machines for improving the level of mechanization. The degree of mechanization in plant protection operation for western regions had unfavorable situation. Therefore, measures should be taken for replacing appropriate machines. The level of rice mechanization was high in the western regions. from the above-mentioned reasons, the level of mechanization of rice in the western region can be attributed to the multiple usage of the driving machines for paddy fields and other crops, the low area under rice cultivation and the large number of tillers and tractors, the lack of companies providing mechanized services, and little time available to farmers to carry out land preparation, transplanting, protection, and harvesting in these regions. The findings also show that tractors and tillers, which are the most important sources of power supply, are not evenly distributed across the western regions. tractors and other self-propelled machines have not been distributed based on the area under cultivation and the economic, climatic, and cultural conditions of the farmers. The smallholder farmers tended to possess a self-propelled machinery while this caused either unused power in rural areas or used only for a short period of time. In some cases, tractors and tillers were used in unrelevant tasks such as transportation and handling. The highest productivity coefficient in the western regions were related to the transplanting by a 6-row walk-behind transplanting and the lowest for the spraying operation with a motorized back sprayer are 76.70 and 4.10%, respectively. The average rice mechanization capacity in the western areas of Guilan province was 154.99 horsepower-hour per hectare. Due to the low number of self-driving cars in these areas compared to the number of operators, the decision-making power of operators in performing operations at the right time is low.