Complex sentence: Before the 19th century, the American agriculture was characterised by abundant of land and relatively of labor.there was slave labuor, but this was limited to the souht.there was therefore the need to introduce a labor saving machine, which could make the work fo the farmers easier.
Split into simpler sentences: Before the 19th century, the American agriculture was characterised by abundant of land and relatively of labor.there was slave labuor, but this was limited to the south. There was therefore the need to introduce a labor saving machine, which could make the work fo the farmers easier.