Service usage of own machinery by farmers and operation costs.

The aim of the study was to estimate the influence of machinery usage on the operation costs. The inve stigation in 60 farms shows that many farmers use own machinery like comb ines or balers in contract work. The analysis is ba ed on individual cases representing possible costs saving due to uni operation costs reduction by higher annual using. The cost reduction was from 2,6 to 62% and income from contract work w as from 800 to 17500 zloty per year.