Collins English Dictionary describes Haggard as follows - "Haggard – (in Ireland and the Isle of Man) – an enclosure beside a farmhouse in which crops are stored. Related to old Norse Heygarthr, from hey hay + garthr yard."  Many believe that this word may have a Scandanavian or Norse origin.
'Hay in the Haggard' - The Haggard was the small field where wheat, oats and barley were stacked and where the threshing took place. The Haggard was the centre of farm life activity in the autumn. This photo shows two men working in a haggard in the Ardcath area with a horse and cart and with hay ricks in the background (courtesy of Frances Lee Gargan from 'The Parish of Ardcath Clonalvy: A History', 2012, original photo from James McGrath)