One of the exhibitors at the SAGT Conference on Saturday was the Macaulay Institute, who describe themselves as "the UK's premier land use research centre". They have produced some fantastic resources about soils and succession, which some of the Year 13 geographers will have seen before, but I have just been looking at their website and there is loads more fantastic stuff on there which is well worth a look.
And on the topic of soils, I've also just discovered Soil-net.com! Enjoy!!