To be a successful farmer one must first know the nature of the soil.” Xenophon, Oeconomicus, 400 B.C. As consumers, we have become a lot more aware of the food we buy — where it’s grown, whether it’s organic, even how nutritious it is — but we may not extend that to thinking about the way the soil itself has been treated and cared for, writes Melanie Rendle for Wicked Leeks. Yet taking care of the soil and preserving its health and fertility without resorting to pesticides, synthetic fertiliser