By Asmar F.   in Plant and Soil

ISSN:0032-079X|195|1|61-64

Springer Publishing Company ‎(1997)‎

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By Gahoonia T.S.   Asmar F.   Giese H.   Gissel-Nielsen G.   Erik Nielsen N.   in European Journal of Agronomy

ISSN:1161-0301|12|3|281-289

Elsevier‎(2000)‎

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