Show hay cures by burning curing hay in sweat stacks by let ting it heat Is really burning part of the hay to make heat to dry the rest the united states department of aarl culture says when the hay heats in the sweat stacks a tape of combustion takes place although there Is no actual flame this method used where there Is BO much rainfall there Is little chance to ann cure the hav produces what Is known as brown hay al though it may be relished by live stock hay cured this way Is inferior to properly made sun cured hay as the heating produces a degree of deterioration teri oration the department says |