The law of april 6 1830 was design to stop the flood of

Said to be the same type of stimulus to the Texas Revolution that the Stamp Act was to the American Revolution, was initiated by Lucas Alamán y Escalada, Mexican minister of foreign relations, and was designed to stop the flood of immigration from the United States to Texas. The law came as a result of the warning and communications of Manuel de Mier y Terán, who made fourteen recommendations directed toward stimulating counter-colonization of Texas by Mexicans and Europeans, encouraging military occupation, and stimulating coastal trade.

productive most commonly means: achieving or producing a significant amount or result.

explanation:

productive can also mean:

producing or giving rise torelating to or engaged in the production of goods, crops, or other commodities.

these depend on how the word productive is used. most likely productive will mean   achieving or producing a significant amount or result.