The key factor for successful application of a contour hedgerow intercropping system is the selection of appropriate nitrogen-fixing plant species to establish the hedgerows. This book describes the results of an experiment carried out at ICIMOD's Demonstration and Training Site at Godavari from 1993 to 2001 to test, select, and demonstrate various nitrogen-fixing trees and shrubs and select appropriate species for the middle hills of Nepal and similar areas of the HKH region. Of the 21 species tested, five (four local, one locally adapted) were finally recommended for use as hedgerow species.