The Board of Agriculture was a British voluntary association and chartered society founded in 1793 to promote agricultural improvement. Under the fuller title Board of Agriculture and Internal Improvement, it was discussed in a published paper of May 1793. The Board had the backing of William Pitt the younger the Prime Minister, and was set up at the start of the French Revolutionary Wars by the efforts of Sir John Sinclair, following a suggestion made in 1790 by William Marshall.