This working paper provides a more in-depth study focused on specific areas in Luang Prabang and Vientiane provinces as a continuation of the first phase study, which was a review of the history of production, marketing,consumption and policy related to secondary crops and non-secondary crops produced in Lao People's Democratic Republic. As maize and Job's tear are the most important secondary crops in Lao PDR, this study will focus on field investigations regarding the potentials and constraints in farming production, marketing and the processing industry of these crops.