Greenhouse Management

What is the most critical environmental factor of greenhouse plant production?

• Temperature

• Light intensity

• Humidity

• Bottom heat

Which of the following is a method used to provide bottom heat?

• A. Unit heater with a fan

• B. Electric heating pad

• B. Electric heating pad

• D. All of the above

For what kinds of crops might a manager choose to use carbon dioxide supplementation?

• A. Low value crops

• B. High value crops

• C. All crops

• D. None of the above

For what kinds of crops might a manager choose to use carbon dioxide supplementation?

• A. Low value crops

• B. High value crops

• C. All crops

• D. None of the above

Which of the following is a principal way of decreasing light intensity in the greenhouse?

• A. Saran

• B. Windows

• C. Shading compound

• Both A and C

_____ emit infrared radiation, which heats only those objects in its path.

• A. Electric heating pads

• B. Radiant heaters

• C. Electric cables

• D. Radial heaters

. _____ are used to control mist systems.

• A. Automatic timers

• B. Remote controls

• C. Manual controls

• D. Electric cables