| http://www.w3.org/ns/prov#value | - ??? ??? ??? most of the mass of organic material of a plant comes from carbon dioxide ??? ??? ??? micronutrients are needed in very small amounts because most serve mainly as cofactors of enzymes ??? ??? ??? the rhizosphere would best described as soil that is bound to roots and differs from the surrounding soil in containing many more microbes ??? ??? ??? some of the problems associated with inte
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