Saline soils are characteristic of arid and semiarid areas with poor internal drainage. (True or false?)

Saline soils are characteristic of arid and semiarid areas with poor internal drainage.
 
  Indicate whether the statement is true or false

Question 2

In which situation are the actinomycetes likely to be most dominant?
 
  A) cold, wet soils
  B) low organic matter soils
  C) neutral, moist, warm soil with lots of partially decomposed residues
  D) extremely acid conditions too severe for most other microorganisms
  E) soil with lots of fresh, easily decomposed residues

Question 3

The addition of large quantities of plant residues to the soil generally ________ the incidence and severity of soil-borne plant diseases.
 
  A) increases B) has no effect on C) reduces

Question 4

The cation exchange capacities of alkaline soils are commonly lower than those of comparable soils in humid regions.
 
  Indicate whether the statement is true or false

Question 5

The fungal symbiont generally benefits from the mycorrhizal relationship by obtaining ________ from the higher plant
 
  A) water
  B) micronutrients
  C) phosphorus
  D) A, B, and C
  E) none of the above

Question 6

In nature, beneficial mycorrhizae form with the roots of ________.
 
  A) grasses
  B) legumes
  C) coniferous trees
  D) broad leaf trees
  E) all of the above