Effects of contour hedgerows of nitrogen fixing plants on soil fertility and yields of sloping croplands in a dry valley of the Jinsha River, China, Sun Hui,; Tang Ya,; Wang ChunMing,; Chen KeMing, , Mountain agriculture in the Hindu Kush-Himalayan region: Proceedings of an International Symposium held in Kathmandu, Nepal on 21-24 May, 2001, p.97-102, (2003) Abstract