Nitrogen Cycle

Question 1

ammonification

Answer 1

production of ammonia from organic nitrogen-containing compounds

Question 2

Nitrification

Answer 2

oxidation of ammonium ions to NITRITE ions

Oxidation of NITRITE ions to NITRATE ions

Question 3

Which plants have nitrogen fixing bacteria, where are they and what is this and example of?

Answer 3

Legumes, in the root nodules, example of mutualism (bacteria provide nitrates to plant, plant provides sugar)

Question 4

Denitrification

Answer 4

Soils waterlogged and oxygen concentration decreases meaning less aerobic nitrifying and nitrogen fixing bacteria and more anaerobic denitrifying bacteria

Question 5

X

Answer 5

Leeching of nitrates causes eutophication

Question 6

Leaching

Answer 6

loss of water-soluble plant nutrients from the soil, due to rain and irrigation (applying controlled amounts of water to plants and needed intervals)

Question 7

Correct sequence of changing ions

Answer 7

NH4 +, NO2 -, NO3-