salting
n.— «Other principles address specific tactics that the law overlooks but which can interfere with employees” ability to make up their minds in a “free, fair and informed way.” For the unions, that means no stuffing the payroll with union organizers in advance of an election, a practice known as salting.» —“A solution to the coming ‘card check’ battle” by David Whitford Fortune Jan. 19, 2009. (source: Double-Tongued Dictionary)