Part I Characteristics of Salt-Affected Soil and its Amelioration by Trees.- Concepts Concerned with Salt-Affected Soil.- Salt-affected soil resources in China.- Characteristics of salt-affected soil and its amelioration by trees.- Urban salinization and its ecological remediation principles.- Part II Principles and Practice of Afforestation in Saline Soil.- Mechanism of salinity tolerance and techniques of trees planting.- Agroforestry and its...