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Tree Essential Elements Manual (Part 1) ( element genesis, organization & essentiality )

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    Life on Earth is a function of water, geology, atmosphere, and genetics. Life extracts materials in many forms from the Earth system and generates more complex materials using energy derived from chemical transformations and sunlight. Past and current success in material accumulation and concentration, plus failure of any life-generated materials to be instantly decomposed, provide the basis for many trophic levels of life to exist. The foundation of Earth’s ecology rests primarily with sunlight capturing and material-extracting green plants.

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Community and Urban Forestry
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