Chapter 18 - Greenhouse Operations and Maintenance #2

Front

What are louvers?

Back

Vertical or horizontal slats placed in a frame that can be angled to allow air and light exchange between the greenhouse and outside environment.

Front

What is the lifespan and energy efficiency of light-emitting diodes (LEDs)?

Back

LEDs have a lifespan of 35,000-50,000 hours and use 75% less energy compared to traditional lighting.

Front

What is drip irrigation?

Back

A method that saves water and labor by using tubes placed within each plant's growing medium, slowly watering via an emitter.

Front

What is a flood floor in greenhouse operations?

Back

A perfectly sloped floor made of nonporous concrete that is flooded with nutrient solution.

Front

What are overhead sprinklers?

Back

A watering method that tends to waste water and wet foliage, using nozzles with a circular overlapping pattern to water from above.

Front

Define compact fluorescent lighting (CFL).

Back

A type of light bulb that uses less energy than traditional incandescent bulbs and has a longer lifespan.

Front

What is the purpose of vents in a greenhouse?

Back

Vents are openings that allow for air circulation and temperature control within the greenhouse.

Front

Explain the concept of a capillary mat.

Back

A mat that uses capillary action to draw water from a reservoir to the plants, providing consistent moisture.

Front

What is the function of a trough system in greenhouse operations?

Back

A method of growing plants in channels that can be flooded with nutrient solutions for efficient watering.

Front

What are the benefits of using high-pressure sodium lighting?

Back

High-pressure sodium lights are efficient for plant growth, providing a spectrum of light that promotes flowering.