The document summarizes changes in British farming practices from the 1700s onwards. Originally, farmers used an open field system of crop rotation across three fields. Later improvements included enclosing fields with hedges and ditches, introducing a four-crop rotation system to eliminate unproductive fallow fields, and inventing a seed drill and mechanical reaper to increase efficiency. Selective breeding of livestock by Robert Bakewell also led to bigger, more productive animals. These changes increased crop and food yields, supporting a growing population while forcing some poor farmers off the land.