The adoption of which two practices to increase the amount of food produced per unit area of farmland?

four-field crop rotation

the application of chemical pesticides

the use of steam-powered tractors

land irrigation using steam-powered pumps

selective livestock breeding

Correct

crop rotation of four fields

selective livestock

The production systems were improved during the seventeenth century with the arrival of professional agriculture and the selective breeding of livestock. The discovery of molecular genetics and genetics offered the possibility of breeding specific animals with desired characteristics and qualities more quickly.The rotation of four fields has its origin in the early sixteenth century in which wheat, turnips, barley and clover were included which in turn raise livestock throughout the year. The rotation of crops in four fields becomes a key development in the British Agricultural Revolution.