a six year cycle and then it starts all over again. each crop takes a different mix of nutrients from the soil depletion is slower and more balanced. the insects thrive in the good soil. there's no need for synthetic nitrogen fertilizer its job is done by the legumes such as clover and beans that make up part of the rotation cycle their roots bind nitrogen from the air and make it available to the soil. crop rotation is a key part of organic farming with it you can kill two birds with one stone well not just two but ten the soil here is nothing like what you have with say a maze monoculture the soil structure is much much better. nice and