| A | B |
|---|
| Nitrogen Fixation | occurs in legumes or root nodules |
| Rhizobium | bacteria that fixes nitrogen |
| 90% | amount of nitrogen fixed by bacteria |
| Nitrification | NH4 ----> NO2 ----> NO3 |
| Assimilation | Process by which plants use nitrogen |
| Ammonification | can occur when animals urinate or decompose |
| Denitrification | when NO2 and NO3 become NH3 and NH4 to N2 again |
| Fertilizer | Biggest impact on Nitrogen and Phosphorus by humans |
| Only nutrient that is not global | phosphorus |
| Found in ocean sediments | phosphorus and Carbon |
| Calcium Carbonate | CaCO3 in shells |
| Deforestation and burning fossil fuels | Causes an increase of CO2 in atmosphere |
| Global Warming | results in a change of carbon cycle |
| Transpiration | removal of large amounts of water from trees |
| infiltration and percolation | determined by pore space in ground |
| hydrologic cycle | moves by solar energy and gravity |
| Sources of phosphorous | detergents, poop, fertilizer |
| Sources of Nitrogen | Proteins, fertilizer, amino acids |
| carbon | found in all living things, currency |
