Farmers mulch plastic film in the field in Yongjing County of northwest China's Gansu Province, Nov. 1, 2009. Gansu Province has planned to spread the agricultural technique of plastic mulching in dry lands covering an area of 0.67 million hectares in 2010.(Xinhua/Shi Youdong)
http://english.people.com.cn/90001/90776/90881/6801360.pdf
