Final answer:
The practice of crop rotation in which fields are planted with different items over a three-year span, but one of those three years, the field is left fallow (not planted) is called the three-field system.
Step-by-step explanation:
The practice of crop rotation in which fields are planted with different items over a three-year span, but one of those three years, the field is left fallow (not planted), is called the three-field system. This agricultural practice involves dividing the land into three fields and rotating crops between them each year. One field is left fallow to allow the soil to regenerate and replenish nutrients for future planting.
The three-field system is a historical agricultural practice where fields are rotated with different crops over three years, with one year leaving the field fallow to improve soil fertility.
The practice in question is known as the three-field system. This is an agricultural technique where fields are planted with different crops over a three-year span, with one of those years leaving the field fallow (uncultivated). This system improved the fertility of the soil by preventing nutrient depletion that typically results from continuous planting of the same crops. It also helped in breaking the cycles of pests and diseases, reducing the need for pesticides, and promoting water quality by preventing runoff. This system was a significant development in sustainable farming practices and played a critical role in boosting agriculture productivity during the medieval period.