Floriculture - Temp, Light, Water Questions

DIF, used for height management of crops, is the difference between the daytime temperature and

night time temperature

The ideal water-to-air ratio in the pores of the soil is:

50% air and 50% water

The term used for the response of a plant to the day-night cycle is

Photoperiodism

Water tubes are:

a device to force water into a cool cell pad for evaporative cooling

The four raw materials needed for photosynthesis to occur in a plant are

carbon dioxide, water, chlorophyll, and light

With mat irrigation, water moves by ___________________ from the mat into the root substrate in the pot to maintain constant moisture.

capillary action

The process of a plant losing water through the leaves in the form of water vapor is referred to as ___________________.

transpiration

Light intensity can be measured in units of:

foot-candles (aka, LUX)

A _______________, is a product applied as a spray or dip that slows the water loss from plant cells, reducing the speed of transpiration and extending the vase life of cut plant materials.

Antitranspirant

Acclimatization in plant production is:

process in which plants adjust to a different growing environment

A clogged floral stem is caused by an air embolism. This is where:

A bubble of air enters the xylem

The temperature to pre-cool potted azaleas to force them to bloom is:

35-40 degrees F

Which of the following statements are true about Carbon Dioxide and greenhouse plant growth?

Limited Carbon Dioxide in the greenhouse reduces photosynthesis and therefore plant growth

Transpiration is the process of a plant or flower losing what?

water

Which watering system is commonly used in the propagation phase of production because it reduces water stress on cuttings?

intermittent mist systems

Tropical flowers require higher temperatures than a typical flower. What degree range is preferred?

55-75 Degrees F

Fresh flowers should be stored in a floral cooler at 34-38 degrees F with 80-90% relative humidity.

True

The essential ingredients for photosynthesis to take place in the plant is:

Water, carbon dioxide, chlorophyll, light

___ is a process in which glucose combines with oxygen to produce energy in a form that can be used by plants

Respiration

The amount of light a plant receives greatly influences root growth, shoot growth, and flowering. The highest quality greenhouse plants need ______________ foot candles of light per day?

4,000-6,000

Most plants grow best in the 40-80 percent relative _____________ range. This is the amount of moisture that is contained in the air surrounding the plant.

Humidity

The primary benefit(s) of shading a greenhouse is (are):

both A and B

Most indoor foliage plants need which kind of lighting?

Bright indirect light