Nitrogen is generally available to plants in only two

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Nitrogen is generally available to plants in only two forms: ammonium and ________.
Biological nitrogen fixation is accomplished by symbiotic ________ living in mutualistic association with plants.
Nitrogen can be returned to the atmosphere when certain bacteria convert it from nitrate into nitrogen gas, which is a process called ________.
Microbial decomposition of organic matter results in NH4+ production through a process called ________.
Nearly all of the phosphorus in terrestrial ecosystems comes from the ________ of calcium phosphate minerals.
___________ develop as a result of incomplete decomposition of organic matter in swamps and marshes.
The process of ____________ produces a form of nitrogen that is easily lost from soil through leaching.
____________ is when too much nitrogen enters an ecosystem and causes forest decline.
_________ primary productivity is the total rate of photosynthesis or energy assimilated by plants.
grossG.grossPlants assimilate energy through the process of _______________.I.photosynthesisI.photosynthesis___________is the process that releases carbon dioxide inthe atmosphere.S.respirationS.RespirationQuestion 7Needs GradingFirst describe three ways that nutrients can be lost from an ecosystem; then describe how nutrients are replaced in those systems.Your response should be at least 75 words in length.

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