Three- field system, Apex

The two field system has two fields use so one half was used to make barley,grain and rye.

While the three field system used 2/3 of the field while the third field was layed for fallow.

A system that allows you to see the cropping pattern in each field each year.

Corn

The three field system replaced the older two field system. In the older system, half the fields were cultivated to raise a crop, and the other half were fallow. In the three field system, a third of the fields were planted with one crop in the spring, a third were planted with a different crop in the fall, and a third were fallow.

Clearly, the three field system meant that the area under cultivation was increased from half the fields to two thirds of the fields.

Also, the three field system implied a more diversified set of crops were being planted, and this contribute to the health of the people on the manors.