Types of pig as reported by the Agricultural Census.
| Agricultural Census Pig Categories for 1920-30 | 1920 | 1930 | 1931 |
|---|---|---|---|
| Sows kept for Breeding |
289,546
|
315,655
|
402,424
|
| Boars for service |
20,933
|
20,787
|
25,720
|
| Other Pigs |
1,683,445
|
1,973,799
|
2,354,864
|
| Date: | Source: |
|---|---|
| 1920 - 1931 | Ministry of Agriculture, Agricultural Statistics (HM Stationery Office) , |
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Between 1920 and 1930, the Agricultural Census distinguished breeding sows and boars for service from all other pigs.