From my experience, I think the following concepts may lift out the extreme poverty:
1. Climate-smart agriculture (CSA): This concept is well known in Africa and Asia. In this concept, the agricultural component will be based on the local resources. For example, if we cannot grow crops then we could include poultry or animal farming, or even sometimes change the food habit. I have experience on the development of a model for CSA in the coastal region of Bangladesh.
2. Year-round vegetables: In Bangladesh, there is some developed model of this concept of Bangladesh Agricultural Research Institute (BARI) for various regions of the country. I was also part of this concept.
I hope these concepts can help for the best
The University of Newcastle