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elements required by plants in relatively large amounts
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elements plants need in relatively small amounts
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mixture of partricles derived from rock, living organisms, humus
most fertile soil
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decomposing organinc material formed by bacteria and fungi
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positively charged minerals are made available to the plant when hydrogen ions in the soil displace the mineral ions form the clay particles.
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catalyzes nitrogen fixation which reduces N2 to NH3 by adding electrons and hydrogen ions
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swellings on roots that contain nitrogen fixing bacteria
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modified roots w/ symbiotic associations of fungi and roots
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| differnt macronutrients plants need |
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carbon oxygen hydreogen nitrogen sulfur phosphrous potassium calcium magnesium
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| different micronutrients plants need |
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chlorine iron boron manganese zinc copper molybdenum nickel
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