文档介绍：原文:
Sustainability of Soil Management Practices - a Global Perspective
1. INTRODUCTION
What is Sustainable Soil Management?
Sustainable development “meets the needs of the present promising the ability of future generations to meet their own needs for land (W C E D 1987). We can adapt this definition to derive a definition for sustainable soil management: “soil management that meets the needs of the present promising the ability of future generations to meet their own needs from that soil”. Thus, soil management is sustainable when it does not alter the capacity of the soil to provide for future needs. In this book, particular emphasis is placedupon the role of soil biology in the maintenance of soil sustainability. Management practices that threaten the soil munity may also threaten soil sustainability by reducing the capacity of the soil to adapt in the future (Yachi and Loreau 1999).
Sustainability of Soil Management Practices
Soil sustainability can be threatened by numerous management practices including over-cultivation, decreased or increased water abstraction, under-fertilisation or over-fertilisation, careless use of biocides, failure to maintain anic matter levels and clearing natural v egetation. These may threaten sustainability in a number of way s through physical and chemical processes (. by increasing soil erosion, salinisation, desertification