BIOA02H3 Lecture Notes - Lecture 10: Ion, Nitrogen Fixation, National Hockey Association

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Basic plant needs: sugar (co2 / light / h2o) + h2o + o2 + nutrients relative elemental analysis of plants. Essential nutrients: absence prevents plant from completing life cycle (ex. produce flowers/grow) Macronutrient required in relatively large amounts: n, k, ca, mg, p, s, si. Micronutrient required in relatively small amounts (all = 0. 4%) Module 1: plant forms & function: cl, fe, b, mn, na, zn, cu, ni, mo. N:p:k usually most limiting nutrients in soil. Fertilizers/plant food have n:p:k ration on how much is in fertilizers: ratio varies on whether one needs to focus on growing food / green (photosynthesis) / tropical / etc. nitrogen) Essential building block for life, basic metabolism, photosynthesis. Atmospheric abundance (78% n2) bioavailability via bacteria: n = inert; non-active. Young soils = limited in n until bacteria build up n lvls: young soils soils that have not harbored life yet, ex: sand dunes, newly deglaciated areas, volcanic islands.

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