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Nutrient utilization
biofuels class
| Question | Answer |
|---|---|
| What are 2 important plant nutrients | 1. nitrogen 2. phosphorous 3. potassium |
| In the fertilizer industry, green house gas emissions are primarily associated with three industrial processes: | 1. ammonia production- only one that can be produced chemically 2. phosphoric acid production 3. nitric acid production - recycling of secondary nutrients is necessary |
| how important is nitrogen in fertilizers? | - production of corn for food and ethanol - increase N2 = increase crop production |
| eutrophication | addition of artificial or natural substances such as N2 or phosphorous through fertilizer or sewage to an aquatic system |
| describe the eutrophication of agricultural runoff | 1. 85% freshwater flows into gulf of mexico 2. 64% originates from Mississippi river lots of dead zones |
| nitrate run off and human health | - nitrate= low toxicity, but reduction of nitrate = nitrite - nitrite is toxic - too much nitrogen= turns ur blood brown - standard 10ppm |
| How does bioenergy from biomass goals affect fertilizer usage? | - US has a very ambitious goal to meet bioenergy goal - chemical fertilizer displaces farmland |
| 3 scenarios of bioenergy from biomass goals | 1. currently sustiainable agricultural crop residue 2. high crop yield increases without land use change 3. high crop yield increases with landuse change |
| effects of bioenergy on fertilizer usage | scenario 4 will require an increase in overall nutrient fertilizer application of 5.5 times current application levels |
Created by:
sunying12
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