Question 1
Which of the following common potassium fertilizers has a

content of 83%?
◦ potassium nitrate
◦ potassium carbonate
◦ potassium polysulfide
◦ potassium hydroxide
Question 2
Which of the following defines Q:I ratio?
◦ It is the ratio of nonexchangeable

(quantity, Q) to
solution

(intensity, I).
◦ It is the ratio of nonexchangeable

(quantity, Q) to
exchangeable

(intensity, I).
◦ It is the ratio of exchangeable

(quantity, Q) to
solution

(intensity, I).
◦ It is the ratio of exchangeable

(quantity, Q) to
nonexchangeable

(intensity, I).