Submitted on: 25 March 2019.
Revised on: 17 July 2019.
Accepted on: 13 September 2019.
___________________AGRICULTURAL HISTORY---DUKE UNIV PRESS
http://reply.papertrans.cn/1/11/1001/1001-12.png
Submitted on: 14 June 2014.
Revised on: 28 August 2014.
Accepted on: 11 September 2014.
___________________AGRICULTURAL HISTORY---DUKE UNIV PRESS
Submitted on: 26 August 2002.
Revised on: 28 November 2002.
Accepted on: 10 December 2002.
___________________AGRICULTURAL HISTORY---DUKE UNIV PRESS
http://reply.papertrans.cn/1/11/1001/1001-15.png
http://reply.papertrans.cn/1/11/1001/1001-16.png
http://reply.papertrans.cn/1/11/1001/1001-17.png
Submitted on: 16 November 2014.
Revised on: 16 January 2015.
Accepted on: 22 February 2015.
___________________AGRICULTURAL HISTORY---DUKE UNIV PRESS
http://reply.papertrans.cn/1/11/1001/1001-19.png
Submitted on: 16 August 2013.
Revised on: 01 October 2013.
Accepted on: 28 November 2013.
___________________AGRICULTURAL HISTORY---DUKE UNIV PRESS