Four inventions of the agricultural revolution included:
the cotton gin
the sewing machine
the threshing machine
the steel plow
the mechanical reaper

Four inventions of the agricultural revolution include following: the steel plow, the mechanical reaper, the sewing machine and the cotton gin.

Agricultural revolution (18th century - 19th century) is an era which helped the people in the innovation of machines and technology to accommodate a bigger and faster productivity in agriculture.