Question

8. The process of conversion of ammonia into to nitrate is called (a) Ammonification (c) N-fixation d) Nitrification 19. The N in dead organic matters can be used (b) directly by micorhizal fiung (c) Through nitrification (d) a+ b (e)a+e 20. The conversion of organic to inorganic forms is called (a) Denitrification (c) Nitrification (b) Decomposition (d) Mineralization 21. The leaves that could decompose slower are (a) Soft (d) Two of the above (b) tough (e) none of the above 22. Rate of decomposition in is lower (c) Tropical rain forests (d) Tundra 23. The Spiraling length of a nutrient is short when (a) The avernge velocity of nutrient movement downstream is low (b) The average time for a nutrient to complete a cycle is short (d) all of the above (e) none of the above in most

Answer 1

Answer:

8). D. Nitrification

Explanation:

• is the biological oxidation of ammonia or ammonium to nitrite followed by the oxidation of the nitrite to nitrate.

19). D. a+b

Explanation:

• or Mineralization is performed by bacteria to convert organic nitrogen to ammonia.

Arbuscular mycorrhizal (AM) fungi are root symbionts that might improve the ability of plants to compete for organic nitrogen products against other decomposer microbes. However, AM uptake of organic nitrogen, especially in natural systems, has traditionally been difficult to test.

20). D. Mineralization

Mineralization occurs in soil as microorganismsconvert organic nitrogen to inorganic forms.

21). C. Woth low nitrogen content

Leaves usually take 6 to 12 months to break down into compost on their own because they don't contain the nitrogen necessary to speed the composting process.