Re: Soil and humic substances. (26.Feb.2018 ))
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Re: Soil and the Use of Fire in Cultivation (27.Dec.2017 )
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Re: The Eternal Cycle of Water (30.Jun.2017 )
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Re: Snow (25.Mar.2017 )
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Re: Seawater (19.Dec.2016 )
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Re: Life and water (1.Nov.2016 )
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Re: Children and Water (1.Oct.2016 )
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Re: Farmers and Water (1.Sep.2016 )
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Re: Water from the forest (1.Aug.2016 )
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