Question

Optimum carbondioxide for high crop yield is

A

1000-2000 ppm

B

2000-3000 ppm

C

3000-4000 ppm

D

4000-5000 ppm

​

Answer 1

Answer:

For most crops the saturation point will be reached at about 1,000–1,300 ppm under ideal circumstances. A lower level (800–1,000 ppm) is recommended for raising seedlings (tomatoes, cucumbers and peppers) as well as for lettuce production.

Answer 2

Answer:

1000 to 1300ppm .................................