1.   Had those surpluses been directed elsewhere in the valley, they could have created a great many small irrigated farms.

2.   Other threats include erosion from logging, evaporation from reservoirs, contaminated runoff from irrigated farms, off-road vehicles, road construction and groundwater pumping.

3.   An institute statement said rice production has been declining on irrigated farms in Asia but did not provide figures.

4.   Scientists said Thursday they have been able to gradually curb declining rice harvests in Asia through a project improving soil quality in irrigated farms across the region.