WEST LAFAYETTE, Ind. (AP) _ Indiana farmers interested in industrial hemp's economic potential can learn about the best production practices for that still-illegal crop at an upcoming Purdue Extension event.

Hemp was an important source of oilseed and fiber in the U.S. until a 1937 federal law ended the industry.

Commercial hemp cultivation remains illegal in Indiana for now, but a state law changed last year permits hemp research.

Purdue University researchers are growing hemp to assess its best production practices, yields and pest- and disease-management.

Purdue Extension experts will discuss those findings and hemp's legal issues at an Aug. 25 workshop at Purdue's Meigs Farm near Lafayette.

Hemp seed is a valuable oil source and a good protein source for animal feed. Its fibers can be used for both textiles and building materials.