The dynamic relationship between precipitation and evaporation in any given location is the ________.
A) capillary action
B) leaching
C) illuviation
D) soil-water budget
E) hydrologic cycle
Question 2
Like ________, humus is a catalyst for chemical reactions and a reservoir for plant nutrients and soil water.
A) clay
B) mud
C) silt
D) cations
E) iron