1.-Name the nitrogen process occurring, or likely to occur, in the described sit

ID: 119962 • Letter: 1

Question

1.-Name the nitrogen process occurring, or likely to occur, in the described situations.

a) Addition of NH4+ fertilizer to warm, moist, aerobic soil with pH 6.5 ________________

b) Addition of NO3- fertilizer to warm, moist anaerobic soil _____________________

c) Addition of an organic material with C:N ratio of 55:1 to warm, moist, aerobic soil_________________

d) Addition of an organic material with C:N ratio of 20:1 to warm, moist, aerobic soil _________________

e) Addition of NH4+ fertilizer to the surface of a soil with a pH of 8.0 _________________

f) Nitrogen is chemically converted to a plant-available form in a factory___________________________

a. nitrification. It is a conversion of ammonia to nitrate. and take place at a pH around 6.5

b. denitrification. - It is a conversion of nitrate to gas and takes place in the absence of oxygen.

c. immobilization. - In this the inorganic N is converted to organic N and decomposition is slow. takes place for high C:N> 25

d. mineralisation.- In this organic N is converted to inorganic N and decomposition is fast. It takes place for low C:N<25

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