London / Reuters Oil prices extended gains on Tuesday after Saudi Arabia pledged to curb exports from next month and OPEC called on several members to boost compliance with output cuts to help to rein in oversupply and tackle flagging prices. Brent crude futures were up 49 cents at $49.09 a barrel by 0933 GMT. US West Texas Intermediate futures …

Bloomberg Oil’s bear market may finally be taking its toll on the shale boom. Hours after Halliburton Co. warned that explorers are “tapping the brakes” on drilling, Anadarko Petroleum Corp. said it’s trimming spending in the first earnings report this quarter from a major shale producer. That could make this week a turning point for the troubled global oil market …

Bloomberg A dairy farm in the home of the world’s biggest energy exporter is considering using cow dung to meet its power needs. Saudi Arabia’s National Agriculture Development Co. is planning to develop a $200 million biomass plant fired by excrement from its bovines, according to people familiar with the matter. Nadec, as the dairy company is known, is in …