Implication of N cycle for agriculture

Question 1

Most plants will use nitrogen compounds produced by?

Answer 1

• free-living nitrogen fixers

- other organisms during ammonification(organic-N– NH4+ like urine)

Question 2

the use of plants of nitrogen compounds is good for ?

Answer 2

for farmes, don’t have to use as much fertilizer

Question 3

Nitrate is more____than ammonium and is more readily ____ to plants.

Answer 3

• soluble

- available

Question 4

plants can they use nitrate and ammonium?

Answer 4

yes , they can

Question 5

source of nitrate would be?

Answer 5

Nitrifying bacteria

Question 6

Nitrifying bacteria is ? processus

Answer 6

NH3__NO2-__NO3-

Question 7

nitrifiyng bacterias require?

Answer 7

O2

Question 8

nitryfing bacteria are in competition with ?

Answer 8

plants for NH3

Question 9

If the soil is poorly drained and becomes waterlogged bad or good for farmes?

Answer 9

Bad for farmers

Question 10

a poorly soil promotes?

Answer 10

denitrification (NO3-_NO2-_NO_N2O_N2)

Question 11

Anaerobic conditions also promote?

Answer 11

sulfur and sulfate reduction which produces H2S wich is toxic for plants

Question 12

why a poorly soil promotes denitrification?

Answer 12

soil becomes anaerobic