The imperial bushel was a standard measurement for grain. For legal use the vessel was made to hold a set capacity and stamped for authenticity.
On the 10th of September 1829, around 18 bushels of wheat were sown on the north side of the barley ground (Diary of William Archer, 10 Sep 1829).
On the 16th of September five wagons of around 400 bushels of wheat was sent to Mr T. Williams in Launceston (Diary of William Archer, 16 Sep 1829). Another five wagons with approximately 500 bushels were sent the next day also (Diary of William Archer, 17 Sep 1829).
On Friday the 18th of September there were 30 bushels of wheat to sow and 2 bushels of oats (Diary of William Archer, 18 Sep 1829).