productive (
http://definr.com/productive)
adj 1: producing or capable of producing (especially abundantly);
"productive farmland"; "his productive years"; "a
productive collaboration" [ant:
unproductive]
2: having the ability to produce or originate; "generative
power"; "generative forces" [syn:
generative] [ant:
consumptive]
3: yielding positive results
4: marked by great fruitfulness; "fertile farmland"; "a fat
land"; "a productive vineyard"; "rich soil" [syn:
fat,
fertile,
rich]