Generalised Pig Categories as reported by the Agricultural Census.
|Year||Breeding Sows||Piglets (Aged under 5 months)||All Other Pigs|
|1940 - 1970||Ministry of Agriculture, Agricultural Statistics (HM Stationery Office) ,|
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This set of three generalised categories is similar to those used for sheep, but can only be reconstructed for 1940 onwards. By identifying breeding sowes, piglets under 5 months and all other pigs we have approximate measures of the breeding stock and the productivity of that stock.