Complex sentence: It was thought that the lands of Hafod and surrounding Cardiganshire were of a type of soil that could not support dairy farming, howeber in 1800 approximately four tons of cheese and of butter were produced.
Split into simpler sentences: It was thought that the lands of Hafod and surrounding Cardiganshire were a type of soil that could not support a dairy. In 1800 approximately four tons of cheese and of butter were produced.