Students doing Agriculture Degrees here at Aberstwyth University may find EDINA agcensus very useful for their studies. It provides online access to data derived from UK Agricultural Censuses. There is a wealth of information available dating back to 1969 and recently statistics have been added from the 2010 Censuses.
The Agricultural Census is conducted in June each year by the government departments dealing with Agriculture and Rural Affairs for Scotland, England and Wales (i.e. SEERAD, DEFRA and the Welsh Assembly's Department for Environment, Planning and Countryside). Each farmer declares the agricultural activity on their land via a postal questionnaire. The respective government departments collect the 150 items of data and publish information relating to farm holdings for recognised geographies.