It's the cash crop of the Taliban and the scourge of Afghanistan — the country's intractable opium cultivation. This year, many Afghan poppy farmers are expecting a windfall as they get ready to harvest opium from a new variety of poppy seeds said to boost yield of the resin that produces heroin. The plants grow bigger, faster, use less water than seeds they've used before, and give up to double the amount of opium, they say.