http://reply.papertrans.cn/2/194/19322/19322-21.png
Submitted on: 18 February 2008.
Revised on: 24 March 2008.
Accepted on: 09 May 2008.
___________________JOURNAL OF SOIL AND WATER CONSERVATION
http://reply.papertrans.cn/2/194/19322/19322-23.png
http://reply.papertrans.cn/2/194/19322/19322-24.png
http://reply.papertrans.cn/2/194/19322/19322-25.png
http://reply.papertrans.cn/2/194/19322/19322-26.png
Submitted on: 14 November 2014.
Revised on: 15 February 2015.
Accepted on: 20 March 2015.
___________________JOURNAL OF SOIL AND WATER CONSERVATION
http://reply.papertrans.cn/2/194/19322/19322-28.png
http://reply.papertrans.cn/2/194/19322/19322-29.png
http://reply.papertrans.cn/2/194/19322/19322-30.png