Page 137 - Enzymes in Tropical Soils

Enzymes in Tropical Soils 125

Important Questions

1. Explain the mass action law or common ion effect in a chemical reaction! What are
its benefits in regulating the release of nutrient elements?
2. Explain the weathering of Albit in soils! What are the effects of soil water contents
and soil pH on the process of weathering?
3. Explain the answer to Question No. 2 with a graph!
4. Explain why the reaction products of Albit weathering must be lowered to fasten the
weathering of Albit! What mechanisms in soils that may decrease the
+
3+
concentrations of Na , Al , and Si(OH) 4 , respectively?
5. What happen to the decomposition of organic P in soil highly treated with P-
fertilizers? Explain!
6. Explain with a graph the decomposition of organic P in soils with different water
contents and phosphatase activity!
7. Explain with a graph the decomposition of organic S in soils with different water
contents and pH!
8. Explain the mechanisms that may decrease the concentrations of orthophosphates
in soil solution!
9. Explain the effect of soil treatment with S-fertilizers on the decomposition of organic
S!
10. Explain the method to fasten the decomposition of organic S!
11. Why do heavy metals in the soil environment deserve more attentions? What are
the effect of heavy metals on the soil enzymatic activities?

Abdul Kadir Salam - 2014