productive

adj. 1 of or engaged in the production of goods. 2 producing much (productive writer). 3 producing commodities of exchangeable value (productive labour). 4 (foll. By of) producing or giving rise to (productive of great annoyance).  productively adv. Productiveness n. [latin: related to *produce]

a. Having the quality or power of producing; yielding or furnishing results; as, productive soil; productive enterprises; productive labor, that which increases the number or amount of products.