Optimum depth of kor watering for rice is A. 135 mm B. 165 mm C. 190 mm D. 215 mm

The optimum depth of kor watering for rice is 165 mm. This is because rice is a water-intensive crop and requires a lot of water to grow.

The depth of water should be sufficient to cover the entire root zone of the plant, but not so deep that it drowns the plant.

Option A: 135 mm is too shallow and will not provide enough water for the plant.
Option B: 165 mm is the optimum depth of water for

rice.
Option C: 190 mm is too deep and may drown the plant.
Option D: 215 mm is too deep and may drown the plant.