Ronald is a farmer. He has been cultivating corn on the same piece of farmland for many years. After every four planting seasons, he leaves his land unplanted to help it recover its fertility. Which type of agriculture is Ronald practicing?
A. shifting cultivation
B. plantation farming
C. sedentary tillage
D. organic farming
C. Sedentary Tillage - Sedentary farming is a method of agriculture in which the same land is farmed every year. This is in contrast to nomadic farming, in which new areas are farmed as the soil becomes less nutrient-rich from extensive planting, and shifting cultivation