知乎，让每一次点击都充满意义 —— 欢迎来到知乎，发现问题背后的世界。 Buffers: Organic Farmers designate the edges of their land as buffer zones. This implies the land is managed in accord with organic practices, even so the crops grown on them aren’t bought as organic because some plants inside the buffer could have already been subjected to genetically https://www.ecofriendlybuzz.com/