CHEM 1002 Chapter : Chapter 20 Notes Worksheet
Document Summary
Converts sun energy into glucose energy that can be used for biological processes. Nutrients for plants: fertilizers: three main nutrients needed for plant growth. _______________: soil can lose these nutrients if land is over-used or through run-off, fertilizers must be added to increase crop production by modern farmers. Nutrient: nitrogen: useful forms: ______ and ______, natural nitrogen fixation (n2) Produces ~1 billion tons of fixed n each year. Nh4: using high pressure and a catalyst. ______________________________: when ammonia is oxidized, an explosive is formed (ammonium nitrate) Nh3 + 2 o2 hno3 + h2o. Hno3 + nh3 nh4no3: urea: alternative to inorganic nh3. Ammonia + __________ = fertilizer product (nothing) anhydrous ammonia. Nutrient: phosphorus: phosphates are needed to make dna, rna, etc. Necessary for growth: source of phosphates: animal bones + acid. Nh3: modern phosphate fertilizers use phosphate rock and phosphoric acid. Protein synthesis: removal of k+ from soil makes soil acidic.
