Quantum redactiones paginae "Humus" differant

37 octeti amoti ,  3 years ago
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==Notae==
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==Bibliographia==
*Weber, Jerzy. [http://karnet.up.wroc.pl/~weber/typy2.htm ''Types of humus in soils.'']] Wroclaw Poloniae: Agricultural University of Wroclaw.
 
[[Categoria:Agricultura organica]]