Submitted on: 14 December 1998.
Revised on: 01 March 1999.
Accepted on: 28 April 1999.
___________________AGROCHIMICA---PISA UNIV PRESS
Submitted on: 14 March 2011.
Revised on: 04 July 2011.
Accepted on: 26 July 2011.
___________________AGROCHIMICA---PISA UNIV PRESS
Submitted on: 27 July 2023.
Revised on: 13 October 2023.
Accepted on: 30 October 2023.
___________________AGROCHIMICA---PISA UNIV PRESS
Submitted on: 30 September 2014.
Revised on: 15 November 2014.
Accepted on: 03 January 2015.
___________________AGROCHIMICA---PISA UNIV PRESS
http://reply.papertrans.cn/1/11/1021/1021-25.png
Submitted on: 10 November 2006.
Revised on: 08 March 2007.
Accepted on: 27 March 2007.
___________________AGROCHIMICA---PISA UNIV PRESS
Submitted on: 11 February 2008.
Revised on: 04 April 2008.
Accepted on: 10 May 2008.
___________________AGROCHIMICA---PISA UNIV PRESS
Submitted on: 24 June 2024.
Revised on: 25 September 2024.
Accepted on: 30 October 2024.
___________________AGROCHIMICA---PISA UNIV PRESS
http://reply.papertrans.cn/1/11/1021/1021-29.png
http://reply.papertrans.cn/1/11/1021/1021-30.png