Without access to chemical fertilizers, medieval farmers developed and relied heavily on the system of crop rotation to dictate,construct,commit,preservethe health of their arable land. This agrarian practice was essential for sustaining the ever-growing populations of medieval Europe. Crop rotation involved the cyclic cultivation,erosion,revision,manufactureof different types of crops on the same plot of land over several seasons or years. This method prevented the discovery,mortality,saturation,depletionof specific soil nutrients, as different crops had varying nutrient requirements and effects on the soil composition. Typically, a farmer would plant grain crops, such as wheat or barley, which were nitrogen-consuming, in one year. The following year, the field would,had been,had,would besown with legumes like peas or beans, which had the ability to fix nitrogen back into the soil. In some rotations, the third year would involve leaving the field fallow – unplanted – to allow the land to recover naturally. In other results,points,aspects,cases, the fallow land would be used for grazing livestock, which helped in manure deposition, further enriching the soil.