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sws3022 UF exam 3 Questions & 100% Correct Answers- Latest Test | Graded A+ | Passed $12.49   Add to cart

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sws3022 UF exam 3 Questions & 100% Correct Answers- Latest Test | Graded A+ | Passed

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  • SWS 3022
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  • SWS 3022

Note the various forms of N -:- 1. Ammonium (NH4+) cation in the soil solution and fixed in secondary clays 2. Nitrate (NO3-) anion in the soil solution 3. Organic N in the soil 4. Ammonia (NH3) gas (released to atmosphere) 5. NO, N2O, N2 gases (released to atmosphere) anion- nitrogen -:- ...

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  • September 4, 2024
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  • SWS 3022
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sws3022 UF exam 3 Questions & 100%
Correct Answers- Latest Test | Graded A+ |
Passed
Note the various forms of N


✓ -:- 1. Ammonium (NH4+) cation in the soil solution and fixed in secondary clays

2. Nitrate (NO3-) anion in the soil solution


3. Organic N in the soil


4. Ammonia (NH3) gas (released to atmosphere)


5. NO, N2O, N2 gases (released to atmosphere)




anion- nitrogen


✓ -:- it is not held by soil colloids and can be lost from the soil

through leaching. However in well aerated soils (plenty of oxygen), most of the NH4+-N


(applied for example as fertilizer) changes to the NO3--N form by a process called

nitrification




cation-nitrogen


1|Page | Grade A+| 2024/2025

,2024 /2025 | © copyright | This work may not be copied for profit gain | Excel!




✓ -:- it can be held on the exchange sites of soil colloids which makes it available for

plant uptake over a long period of

time.




Describe one reaction that leads to loss of N from the soil:


✓ -:- Nitrate leaching into ground

water.




symbiotic N2 fixation that occurs between legumes and rhizobium


species.


✓ -:- Host plant supplies the N fixing organisms with fixed C (photosynthate which is

used for respiration and N2 fixation), and the host plant benefits from the fixed N.




N2 fixation is a reduction reaction and happens in the nodule in a completely anaerobic

environment




inorganic P
2|Page | Grade A+| 2024/2025

, 2024 /2025 | © copyright | This work may not be copied for profit gain | Excel!




✓ -:- found in insoluble compounds in the soil




N is found in two forms:


✓ -:- 1) Ammonium (NH4+) - cation

2) Nitrate (NO3-) - anion




NH4 and NO3 in soil solution constitute about 1% of N in the soil. Again most of the N in

soils is in organic forms.




Due to rapid nitrification in soils, plants absorb predominately NO3.




Some plants prefer N in the NH4 form for example rice. Other plans that grow under acidic

conditions seem to prefer NH4 too.




ATP


✓ -:- adenosine triphosphate (drives most energy-requiring biochemical processes ex

uptake of nutrient)


3|Page | Grade A+| 2024/2025

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