BIOA02H3 Lecture 10: Lec10 - Plant Nutrition and Soils.doc

• School: UTSC
• Department: Biological Sciences
• Course: BIOA02H3
• Professor: Mary Olaveson

Document Summary

Slide one plant nutrition and soils: nutrients necessary for plant life, nutrient availability in soils, nutrient uptake by plants, biotic helpers for plant nutrient uptake. Slide two basic plant needs: sugar, co2, light. Slide three most important elements for plants: sources, h2o / co2. Slide four essential nutrients: 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: nitrogen, phosphorus, potassium. Central nitrogen atoms: necessary in atp, necessary in dna / rna. Slide nine biogenic nitrogen cycle: atmosphere made up of 78% nitrogen, nitrogen transfer via thunder is negligently small compared to nitrogen fixation by bacteria, two classes of bacteria, free living. Contains metabolic pathways required to fix nitrogen in soil (plant compatible)