Another year on the Diddly Squat Farm and Jeremy is still knee-deep in mud and endless challenges . . . Welcome back to Clarkson's Farm. Since taking the wheel three years ago Jeremy's had his work cut out. And it's now clear from hard-won experience that, when it comes to farming, there's only one golden rule: Whatever you hope will happen, won't. Enthusiastic and inventive schemes to diversify have met with stubborn...