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Submitted on: 06 February 2013.
Revised on: 07 March 2013.
Accepted on: 15 March 2013.
SOIL & TILLAGE RESEARCH---ELSEVIER
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Submitted on: 09 March 1999.
Revised on: 18 April 1999.
Accepted on: 25 April 1999.
SOIL & TILLAGE RESEARCH
Submitted on: 04 January 1998.
Revised on: 26 January 1998.
Accepted on: 12 February 1998.
SOIL & TILLAGE RESEARCH---ELSEVIER
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http://reply.papertrans.cn/3/283/28294/28294-18.png
Submitted on: 03 May 2001.
Revised on: 19 May 2001.
Accepted on: 08 June 2001.
SOIL & TILLAGE RESEARCH
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