21. According to the results of Study 2, what was the greatest percent increase in yield for a cornfield, and what was the amino sugar N content of the soil in the cornfield with this increase in percent yield?
Your Answer is
Correct Answer is C
Explanation
Looking at figure 2, the maximum value of the ordinate is a little over 120, and the corresponding abscissa is about 60. The closest option is 122% & 65 mg/kg