Some values for census items measured in hectares are greater than the total grid square area, why?
A. There are anomalies in the collection of Agricultural Census data that distort the grid square estimates. For example, a farmer is only required to return one census form, even if he owns several holdings, some of which may be in other parishes or even quite remote from the main holding. Certain items, especially rough grazing etc., may be either grossly over- or under-represented in any particular area. For example, data on rough grazing and woodland are not available for many years for Scotland. The anomalies in the way these items are reported at parish level are too great to make conversion to grid square estimates sensible. A farmer can report all his holdings on one census form and these 2 items in particular may include land in other areas well away from the main holding. Other area items, e.g. total area, are similarly problematic. Grid square estimates are derived from parish summaries or DEFRA estimates, taking account of potential land-use capability at 1km level. In the
