May 7 (Reuters) - Australia's Orica Ltd ORI.AX , the world's top supplier of commercial explosives, said on Monday that first-half underlying profit fell 36.7 percent, as unplanned plant shutdowns and bad weather crimped production.
Underlying profit, a measure of earnings that excludes one-off gains and losses, fell for the six months to March to A$123.6 million ($93.13 million) from A$195.2 million a year ago.
Orica declared an interim dividend of 20 Australian cents per share, down from 23.5 cents a year earlier. ($1 = 1.3271 Australian dollars)