This map explains and confirms a lot. When my neighbour last year said he never watered his potatoes during the scorching summer as the water table was so close to the surface and didnt need to, he was right. It explains why my dads allotment in Huddersfield is so easy to till, and why our site on the south coast is a challenge with its clay pans, high groundwater and flooding... it also goes some way to justifying why No-Dig might not be right for this area. Our site has been here for 125 years and the ancestors of current plotholders have passed on their methods of how to grow certain things in our heavy claggy soil and thats probably the way we must continue. The carrots and parnsips are the big test as most here give up quite quickly, but I've recently been let into the secret...!