The threshing
machine has given way to the combine, usually a self-propelled unit that
either picks up windrowed grain or cuts and threshes it in one step. The
grain binder has been replaced by the swather which cuts the grain and
lays it on the ground in windrows, allowing it to dry before being
harvested by a combine. Plows are not used nearly as extensively as
before, due in large part to the popularity of minimum tillage to reduce
soil erosion and conserve moisture. The disk harrow today is more often
used after harvesting to cut up the grain stubble left in the field.
Although seed drills are still used, the air seeder is becoming more
popular with farmers. Today's farm machinery allows farmers to cultivate
many more acres of land than the machines of yesterday.width,
nozzle capacity and spray pressure all influence sprayer outputs.
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| Threshing machine |
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