Spreading rice straw on irrigated rice field after harvest in order to conserve moisture for the production of tomatoes and cowpeas. - - Smallholder Oriented Irrigated Rice Production (Phase 111): URT/90/017. The main purpose of this UNDP/FAO/Government of Zanzibar project is to complete the development of smallholder irrigated rice production so that the systems so far developed are operated and maintained by the farmers themselves, with the Government provid