The amount of a pesticide that hits the target pest is usually ________ of the amount applied to the ecosystem.
A) less than 5 B) 20 to 25 C) 25 to 50 D) 50 to 75 E) 75 to 95
Question 2Which group of organic insecticides is most damaging to earthworms in soils?
A) chlorinated hydrocarbons B) organophosphates C) carbamates
Question 3The cost of fertilizer is the main consideration of nutrient management for most ornamental landscaping applications.
Indicate whether the statement is true or false
Question 4If you want to quickly (in just a few days) increase the pH of a soil from 5.5 to 7.0, which of the following would you use?
A) calcitic limestone
B) ammonium nitrate
C) burned lime
D) dolomitic limestone
E) sawdust
Question 5Annual soil movement due to tillage erosion can be calculated using a simple function of the type of tillage being used and the landscape erodibility.
Indicate whether the statement is true or false
Question 6Dolomitic limestone is a good material to fertilize acid soils with both for both Ca and Mg.
Indicate whether the statement is true or false
Question 7Assume you want to grow azaleas in a soil with a pH of 6.0. The application of which of the following would be most appropriate to make this soil suitable for this ornamental?
A) chicken manure
B) limestone
C) elemental sulfur
D) hydrated lime
E) iron oxide
Question 8The total global soil lost through erosion is generally greater from gully erosion than from sheet erosion.
Indicate whether the statement is true or false
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