ENVS 4012 Lecture Notes - Lecture 4: Fritz Haber, Carl Bosch, Sewage Sludge
14 May 2017
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Name the 3 important plant macronutrients: nitrogen, phosphorous, potassium (n, p, k) Soils provide an unlimited supply of bioavailable plant nutrients: false. Describe a soil condition where you find nutrient deficiencies: sandy soil, soil that has been intensively cropped. Nitrate isn"t held well by soils because its negative charged. Phosphourous is also negatively charged, but combines with other insoluable*held strongly in soils, but not heavily available in bio. Important in synthesis of proteins, carbohydrates and chlorophyll; helps plants to adapt to environmental stress: soils are negatively charged, can be held and released by soils. Bioavailable forms: potassium cation (k+) in solution. Additions (of nutrients to soil: added fertilizer, added organic matter, atmospheric deposition. Losses (loss of nutrients: leaching, erosion/ run-off, plant uptake and harvest. Organic fertilizers: animal manure, green manure and other plant residues, biosolids (sewage sludge) and other urban/industrial wastes. Inorganic=fertilizers comes from things other than living things.
