Greenhouse

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

• Temperature

• Light Intensity

• Humidity

• Bottom Heat

Which of the following is a principal type of heating systems used in greenhouse production?

• Hot water tubes

• Electric cables

• Steam or hot water

• All of the aboe

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

• Unit heater with a fan

• Electric heating pad

• Radiant heaters

• All of the above

_____ is a technique where water-soluble fertilizers can be applied through irrigation systems.

• Aquafertilization

• Chemigation

• Fertigation

• None of the above

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

• Low value crops

• High value crops

• All crops

• None of the above

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

• Saran

• Windows

• Shading compound

• Both A and C

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

• Electric heating pads

• Radiant heaters

• Electric cables

• Radial heaters

_____ are used to control mist systems.

• Automatic time clocks

• Remote controls

• Manual controls

• Electric cables

Adding _______ can cool the greenhouse and raise the relative humidity.

• Fans

• Fog

• Steam

• Bottom Heat

_____ ventilation allows warm air to escape while drawing in fresh, cooler air.

• Active

• Passive

• Natural

• Automatic