Most soil organisms are heterotrophs. (True or false?)

Most soil organisms are heterotrophs.
 
  Indicate whether the statement is true or false

Question 2

The likelihood of polluting groundwater with pesticides and plant nutrients is enhanced by:
 
  A) light tillage of the upper centimeter or so of soil.
  B) the presence of macropores in the soil.
  C) conventional tillage as a choice compared with conservation tillage.
  D) the use of tillage to control weeds.
  E) the production of oats rather than wheat.

Question 3

Which of the following will increase the evaporation (E) from the soil surface?
 
  A) plastic mulch
  B) the use of no-till culture
  C) stubble mulch farming
  D) adding straw mulch to the soil surface
  E) none of the above

Question 4

Which of the following locations in the United States would have the highest evaporation (E) from the soil surface in July?
 
  A) a bare, unirrigated dry land soil in Colorado
  B) a forest woodland in Illinois
  C) an unirrigated soil in South Carolina growing cotton
  D) a corn field in New York
  E) a furrow-irrigated cotton field in Arizona

Question 5

When preparing a surface soil seedbed, the soil should generally be in the loosest, least dense soil condition in the row where the seed is placed.
 
  Indicate whether the statement is true or false