Submitted on: 03 April 2018.
Revised on: 15 April 2018.
Accepted on: 30 April 2018.
Transactions of the ASABE---SPRINGER HEIDELBERGN/A
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Submitted on: 03 July 2010.
Revised on: 05 August 2010.
Accepted on: 23 August 2010.
Transactions of the ASABE
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