Definition
Sources of irrigation are the following:
NIA - a government irrigation system built and constructed by the National Irrigation Administration to provide continuous supply of water for agricultural purpose to farmers in exchange for a fee.
Communal Type - a system with an area less than 1,000 hectares constructed by the NIA but turned over to the Irrigators Association for operation and maintenance. The cost is to be amortized by the Irrigators Association for a period of not exceeding 50 years.
Individual Type - a water system such as pump provided personally by the farmer for his irrigation needs. It could be rented, borrowed or owned by him or any other member of his household.
Gravity Type - this is where the supply of irrigation water available is as such level that is conveyed on the land by the force of gravity.
Others - for this option, specify any irrigation system mentioned by the respondent which is not among those provided in the questionnaire, e.g. irrigation canals, Small Water Impounding Project (SWIP), natural marshland, along shores of Laguna Lake, along creek routes, etc.