Peltoviljelykoneiden käytöstä, kestoiästä ja poistamissyistä

Authors

• Erkki H. Oksanen Maatalouden työtekniikan laitos, Helsingin Yliopisto

DOI: https://doi.org/10.23986/afsci.71799

Abstract

Tractor ploughs, fertilizer spreaders, and mowers were chosen as study machines. The material was collected by farm visits from the same 83 farms in 1959, 1964, and 1969. Larger farms acquired machines proper to new working methods sooner than smaller ones, apart from that they did not have newer machines. The age of machines did not affect the yearly use. The average use in 1969 and the ages in different study years were: tractor ploughs 76 hours, 24.2 hectares, 5.4—5.9 years; spreaders 43 hours, 32.7 hectares, 6.5—9.2 years; mowers 21 hours, 11.1 hectares, 6.5—8.3 years. There was a strong positive correlation between amount of use of ploughs and spreaders and the arable land area of the farm. The standard deviation in the amount of use as well as in the age of machines was big. In 1969 the remaining years of use for machines in current use were estimated to be two to four years less than in 1959 for similar machines of the same age. The average ages of the machines when discarded were: ploughs 8—10 years, horsedrawn spreaders 14—16 years, tractor spreaders 7—9 years, horse-drawn mowers about 20 years, and tractor mowers 5—7 years. The main reason for discarding horse-drawn machines was a change over to tractor drawn ones. Tractor machines were discarded chiefly because of a change of the tractor, because of weakness or unsuitability of the machine, or obsoleteness of the model. Only very few of the ploughs and mowers were worn out in use as was sometimes the case with spreaders.