From Q/I relationship described by Beckett (1964), a high PBC^K indicates that

A. The soil has been recently limed

B. The soil needs potassium fertilization

C. Availability of potassium in the soil is excellent

D. The soil needs zinc

Answer: Option C

Solution(By Examveda Team)

From the Q/I relationship described by Beckett in 1964, a high PBCK indicates that the availability of potassium in the soil is excellent.
The Q/I relations of labile soil K relate its availability or intensity (I) to the amount (Q) present. Values of labile K+ indicated a greater K+ released into the soil solution, resulting from a larger pool of soil K+. a high value of the potential buffering capacity for K+ (PBC^K) in the soil is indicative of a good K+.