6 Nitrogen Diagram:A-C Nitrogen gas is fixed by lightning to nitrate in the soil (Nitrogen fixation)B-G Ammonia from waste decomposes to nitrite by bacteria (nitrification)G-C Nitrite is converted to nitrate by bacteria (nitrification)
7 D-A Soil nitrate becomes nitrogen gas (denitrification) C-E Nitrate is used as fertilizer by plantsE-F plant protein nitrogen becomes animal protein when eatenF-B Animal protein waste decomposes to ammonia by bacteria
8 IV. Nitrogen cycle: Plants only use nitrate Muscle tissue is made of amino acidsDecomposition of protein makes ammoniaAmmonia converts to nitriteNitrite converts to nitrate
9 V. Nitrogen Cycle Nitrification: ammonia to nitrite & nitrite to nitrate by bacteria in the soilDenitrification: nitrate to nitrogen gas by bacteriaDecompostion: ammonia in wastes to nitrite by bacteriaNitrogen fixation: nitrogen gas to nitrateby lightning or nitrite by plant/ bacteria
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