A scythe is an agricultural hand-tool for mowing grass or harvesting crops. It was historically used to cut down or reap edible grains before they underwent the process of threshing. Horse-drawn and then tractor machinery largely replaced the scythe, but it is still used in some areas of Europe and Asia, especially in Yakutia, Siberia. Reapers are bladed machines that automate the cutting action of the scythe, and sometimes include subsequent steps in preparing the grain or the straw or hay.