Gleaner

n.	1.	One who gathers after reapers.
	2.	One who gathers slowly with labor.

Noun	1.	gleaner - someone who picks up grain left in the field by the harvesters
	2.	gleaner - someone who gathers something in small pieces (e.g. information) slowly and carefully

farm worker, farmhand, field hand, fieldhand, glean, harvest, reap