Closeup of hands holding pigeon peas (Cajanus cajan). - - Smallholder Agricultural Productivity: Agricultural Rsearch: MLW/92/007. Pigeon Pea and Legumes Research and Development. This is a subcomponent of the Smallholder Agricultural Productivity Programme funded by UNDP. The main focus of this subcomponent has been pigeon pea. It aims at developing varieties adapted to the small h