Questions tagged [nitrogen]

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How big of an issue are Nitrogen and phosphorus flows to the biosphere and oceans?

The Stockholm Resilience Center created a report about "The nine planetary boundaries". In it, they claim that Nitrogen and phosphorus flows to the biosphere and oceans are very strongly ...
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3 votes
1 answer
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How does nitrogen cycle work?

Golly, please help me understand this nitrogen cycle (the terrestrial one). I skimmed through some materials (e.g. 1, 2) but still don't understand. What I made of all of of it: first it's "fixed&...
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1 vote
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Why is the concentration of nitrogen gas almost equal in soil air and the atmosphere?

From the composition of soil air, we know that oxygen is much less than that of atmospheric air. On the other hand, carbon dioxide is higher in soil. However, nitrogen gas is very much similar in both ...
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-5 votes
1 answer
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How much nitrogen would you need to replace all oxygen in a room of 1,000 cubic feet? [closed]

Imagine a room of 10x10 feet in size with a 10 feet high ceiling. The air in the room consists of roughly 78 percent nitrogen and 21 percent oxygen. The windows are shut closed and the gap under the ...
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8 votes
1 answer
1k views

Where did the atmosphere's nitrogen come from? [duplicate]

According to Wikipedia's article Atmosphere of Earth: Outgassing from volcanism, supplemented by gases produced during the late heavy bombardment of Earth by huge asteroids, produced [Earth's ...
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1 answer
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How to interpret correctly this chart about nitrogen oxide?

I found the below chart in a test for university access in Sweden, with the following question: How large was the total emission of nitrogen oxides caused by Swedish consumption under the period 2004-...
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3 votes
1 answer
65 views

Rain Water vs Sprinkler Irrigation

During the rainy season, the crops like corn, cotton are found to be growing faster. Studies shows that the thermoelectric fixation of gaseous Nitrogen during rain storm accelerates the plants growth ...
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1 vote
1 answer
105 views

Does nitrogen fixation plants consume nutrients from soil

I am a farmer. I have lot of "touch me not" plants (Mimosa pudica)in my coconut plantation field. Many people are saying I have to get rid of them for two reasons: It is very difficult to walk in the ...
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5 votes
3 answers
352 views

Why is carbon dioxide a more important greenhouse gas than nitrous oxide?

I admit that this is not a genuinely earth sience question, but since there is no stack exchange site genuinely devoted to general ecology, I dare to ask it here: From a table in the German Wikipedia ...
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3 votes
0 answers
27 views

Sequestration of NO and NO2 Gasses into Soil

The university I'm a student at has been looking into Anaerobic digestion to reduce the environmental impact of the large amount of post-consumer food waste generated on campus. While this project has ...
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4 votes
2 answers
1k views

Feedback loops between soil chemistry and plant growth

Would the dynamic between soil nitrogen and plant growth be a positive or negative feedback loop I think it is a negative feedback loop because as soil nitrogen increases then plant growth increases, ...
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6 votes
0 answers
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Will the recent findings regarding nitrogen rock weathering alter climate change projections?

I've seen a few articles lately about research published in the Journal Science that concludes that 26% of the nitrogen in the ecosystem is from rock weathering. These results seem to fill in a ...
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6 votes
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130 views

How does one find the soil fertility characteristics for islands of Hawaii?

I am trying to find a way to describe the relative soil fertility characteristics for the islands of Hawaii, Maui, and Kauai (youngest to oldest). I want to know about their nitrogen fixation, soil ...
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2 answers
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Did the Haber-Bosch process enable the population explosion?

Im a bit confused on how crucial Nitrogen fixation with the Haber-Bosch process really was. On the Wikipedia page of the Haber-Bosch process it says: In combination with pesticides, these fertilizers ...
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5 votes
1 answer
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Nitrogen cycle semantics; nitrification/nitrogen fixation

Is 'nitrification' and 'nitrogen fixation' used interchangeably to describe biological reduction of $\ce{N2}$ gas to $\ce{NH3}$? I know $\ce{NH4} \to \ce{NO3}$ is called nitrification too.
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3 votes
1 answer
522 views

Are there plants or bacteria that perform NO2 fixation and how relevant are they for improving local/regional air quality?

Nitrogen dioxide (NO2) is a relevant air pollutant i.e. by contributing to the ozone (O3) production. I was wondering if there are any plats or bacteria that fix NO2. I have read that legumes fix N2, ...
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2 votes
2 answers
484 views

How to find molarity of a fertilizer?

I want to add nitrogen to my soil samples in a lab as fertilizer (ammonium nitrate). I need to add it equivalent of 50 kgN/ha. I have a clump of soil, that weighs 20g. What is the best way to convert ...
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9 votes
2 answers
37k views

Is oxygen the most abundant element on Earth?

When I was in school, I was taught that we need oxygen to breathe, but it actually constitutes only a small fraction of the atmospheric composition, and that nitrogen constituted the largest fraction ...
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13 votes
1 answer
239 views

How are critical loads of nitrogen deposition on eco-regions determined?

Natural habitats have a "critical load" threshold in regards to deposition of nitrogen compounds (both wet and dry deposition). The critical load is calculated in kg N / hectare and is specific to ...
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25 votes
5 answers
14k views

What is the origin of the dominant atmospheric nitrogen content in Earth's atmosphere?

Comparing the atmospheric compositions of Earth with our nearest neighbours: As the table shows, the Earth's atmospheric nitrogen concentration is 78%, compared to 3.8% for Venus and 2.7% for Mars ...
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15 votes
1 answer
254 views

Break in human nitrogen input in 1990s

I'm in an AP Environmental Science course, and while reading part of the chapter in my textbook about the nitrogen cycle, I saw this picture. What I was wondering is what caused that dip in the ...
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25 votes
2 answers
876 views

Why do some planets have lots of $\mathrm{N_2}$ and others none?

Earth, Titan and Venus all have large amounts of $\mathrm{N_2}$ in their atmospheres. (In the case of Venus it's a small proportion, but Venus' atmosphere is very thick, and the total mass of $\mathrm{...
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