Farm machinery, mechanical devices, including tractors and implements, used in farming to save labour.
Farm machines include a great variety of devices with a wide range of complexity:
from simple hand-held implements used since prehistoric times to the complex harvesters of modern mechanized agriculture.
The operations of farming for which machines are used are diverse.
For crop production they include handling of residues from previous crops; primary and secondary tillage of the soil; fertilizer distribution and application; seeding, planting,
