Page 71 - Enzymes in Tropical Soils

Enzymes in Tropical Soils 59

8. How do the plant roots affect the soil enzymatic activities?
9. How long do the soil enzymes persist in the soil system? Explain!
10. How can the relationship between the activity of soil enzymatic activities and water
content indicate the roles of soil microorganisms in producing soil enzymes? Explain!
11. How can the relationship between the soil enzymatic activities and CO 2 evolution
indicate the role of soil microorganisms in producing soil enzymes? Explain!
12. How can the soil microorganisms affect the soil enzymatic activities?
13. How can the earthworms affect the soil enzymatic activities?
14. How can the plant roots affect the soil enzymatic activities?
15. Expain the forms of enzymes in soils and their relationships!
16. Explain whether the soil enzymes produced in topsoils may affect the subsoils
through leaching process!
17. Can soil enzymes move from one place to another? Explain!
18. What is the C-Cycle? Explain it with a process diagram! What is its benefit to the
environment management?
19. What is the P-Cycle? Explain it with a process diagram! What is the role of soil
enzymes?
20. What is the S-Cycle? Explain it with a process diagram! What is the role of soil
enzymes?
21. What is the role of phosphatase? Explain it with a chemical reaction! What is the
role of water in the reaction? What is the effect of soil pH on the activity of
phosphatase?
22. What is the N-Cycles? Explain it with a process diagram! What is the role of fixation
and ammonification processes?
23. Explain the nitrification process along with some soil microorganisms involved in it!
24. What is volatilization? How do this process happen? Explain!
25. What are urease, urease inhibitors, and their roles in the use of Urea in soils?
Explain!
26. What is the good side and the bad side of nitrification in relation to N in the soil
environment? Explain!
27. Explain the analysis of urease activity in soils!
28. Explain the analysis of phosphatase activity in soils!
29. Explain the analysis of arylsulphatase activity in soils!
30. Explain the analysis of -glucosidase activity in soils!
31. What are the factors controlling the rates of the soil biochemical reactions?
32. Explain the role of substrate concentration in controlling the rates of the soil
biochemical reactions!
33. Explain the role of enzyme concentration in controlling the rates of the soil
biochemical reactions!
34. Explain the role of soil temperature in controlling the rates of the soil biochemical
reactions!
35. Explain the role of water in controlling the rates of the soil biochemical reactions!

Abdul Kadir Salam - 2014