Azaleas, pin oaks and other acid-soil loving forest plants have evolved very efficient mechanisms for extracting iron from soils.
Indicate whether the statement is true or false
Question 2
Which of the following human actions is most apt to result in a long term increase in soil pH?
A) application of NH4- containing fertilizers
B) emission of gases from automobiles
C) application of unlimed sewage sludge
D) irrigation with high sodium salt-containing waters
E) application of farm manure
