First earthing in potato should be done . . . . . . . . days after planting to provide optimum space for tuberization.

A. 20 - 25

B. 30 - 35

C. 38 - 45

D. 40 - 50

Answer: Option B

Solution(By Examveda Team)

First earthing in potatoes should be done 30 - 35 days after planting to provide optimum space for tuberization.
The main object of earthing up is to keep the soil loose and destroy weeds. Two or three earthing up should be done at an interval of 15 - 20 days. The first earthing-up should be done when the plants are about 15 - 25 cm high. The second earthing up is often done to cover up the tubers properly.