Mitscherlich factor for phosphorus is

Answer: Option D

The equation introduced by Mitscherlich has been generally used to express nutrient-yield relationships as follows: $$\mathbf{y}=\mathbf{A}\left(1-{\mathbf{e}}^{-\mathbf{eb}-\mathbf{ex}}\right).$$
The classical Mitscherlich equation is based on Leibig’s Law of the Minimum and describes the yield response of a crop to an increase in the main factor that is limiting growth.
Mitscherlich's factor for phosphorus is 0.6.