BIOA01H3 Lecture Notes - Lecture 10: Osmosis, Silt, Cation-Exchange Capacity

• School: UTSC
• Department: Biological Sciences
• Course: BIOA01H3
• Professor: Steve Joordens

Document Summary

Slide three most important elements for plants. Absence prevents plant from completing its life cycle. Macronutrients: required in relatively large amounts. Micronutrients: required in relatively small amounts. If it is missing either macro or even micro nutrients, it will not be able to complete its life cycle. Slide five most limiting under average conditions. Essential building block for: life, basic metabolism, photosynthesis. Atmospheric overabundance (78% n2: bioavailability mainly through bacteria. Young soils limited in n until bacteria build it up. Building blocks of life are made up of amino acids (containing nitrogen and hydrogen) forming. Necessary in photosynthesis as: chlorophyll a, chlorophyll b. Nitrogen transfer via thunder is negligently small compared to nitrogen fixation by bacteria. Contains metabolic pathways required to fix nitrogen in soil (plant compatible) As bacteria die, they decompose into amino acids and other organic molecules. Amino acids decompose into: ammonia, nitrite, nitrate. Most bio-accessible to plants (easiest to take up)