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soil types (including sand), general reference
what ia organic and mineral properties
structure physical properties
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Libyan Sahara Water from the Desert - The Secrets of Nature, 00:43:58
50 ha plot reclamation, 2014
"You had to add different kinds of minerals."

Diversity is the key to economic and political evolution.
by Cat on Wed Sep 12th, 2018 at 12:51:57 AM EST
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