Which group of organic insecticides is most damaging to earthworms in soils?

Which group of organic insecticides is most damaging to earthworms in soils?
 
  A) carbamates B) chlorinated hydrocarbons C) organo phosphates

Question 2

Why don't we have chemical controls for minor turfgrass diseases?
 
  What will be an ideal response?

Question 3

Which class of organic toxins is often intentionally applied to soils?
 
  A) preservatives
  B) plasticizers
  C) pesticides
  D) refrigerants
  E) fuels

Question 4

Unlike Rhizobium bacteria, Bradyrhizobium bacteria are effective at fixing N, regardless of the type of plants present.
 
  Indicate whether the statement is true or false

Question 5

In the U.S. Department of Agriculture's land capability classification systems, some 15 of the Nation's cultivated land is in Class I.
 
  Indicate whether the statement is true or false

Question 6

Saltation is the process of wind movement of salt-affected soils from one location to another in arid regions.
 
  Indicate whether the statement is true or false