Some soil colloids exhibit positive charges under highly acid conditions. To what are these charges likely due?
A) protonation of some hydroxy groups by excess H+ ions
B) substitution of lower valent atoms for higher valent atoms in the octahedral sheet
C) the adsorption of Al3+ ions on the colloid
D) increase in the level of H+ ions on the exchange complex
E) the release of some OH- ions leaving an unsatisfied positive charge on the colloid
Question 2
The amount of both P and K fertilizer applied to U.S. farmland has increased dramatically since 1980 as American farmers attempt to maximize profits and meet record demands for food.
Indicate whether the statement is true or false
Amino acid chart
Conditions for Eclipses
Titration curve for aspartic acid
Fate of the Amino acid carbon skeletons
Soil Components
Acid–Base Balance