Greenhouses

Question 1

method of greenhouse construction where modular roof units are connected at the eave by a common gutter

Answer 1

Ridge and furrow greenhouse or

Gutter connected

Question 2

structure that provide a reliable enclosure within which an environment favorable to plant growth can be attained

Answer 2

Greenhouse

Question 3

removal of heat from the interior of the greenhouse

Answer 3

Cooling

Question 4

addition of heat to the interior of the greenhouse from any energy source including the sun

Answer 4

Heating

Question 5

prevents excess solar radiation in the greenhouse

Answer 5

Shading

Question 6

process of exchanging air inside the greenhouse with outside air to control temperature,
humidity, oxygen or carbon dioxide levels

Answer 6

Ventilation

Question 7

ventilation of greenhouse using fans

Answer 7

Mechanical ventilation

Question 8

ventilation of greenhouse which occurs through controlled openings due to natural pressure variations inside and outside the greenhouse

Answer 8

Natural ventilation

Question 9

Benches should be up to __m wide if they are to be access from both sides, and should not exceed __m if they are accessible only from one side.

Answer 9

1.8m ; 0.90m

Question 10

An air circulation space of approximately __mm shall be allowed between the
sidewalls and the benches.

Answer 10

160mm

Question 11

For fixed benches the usable space should be ___% - ___% of the floor area while ___% for rolling benches.

Answer 11

66%-75% ; 90%

Question 12

If the walkway will be used only as a place to stand while servicing the benches, a minimum of ___m aisle shall be used for determinate crops and a minimum of ___m aisle
for indeterminate crops.

Answer 12

0.30m ; 0.80m

Question 13

Larger greenhouses often have __m -__m secondary aisle and __m - __m primary aisle. If a worker is in a wheelchair, __m wide aisle shall be used and ramps shall be provided for easy access.

Answer 13

0.60m to 0.90m ; 1.2m to 1.8m ; 1.2m

Question 14

The length of the greenhouse should not exceed __m. For gutter connected
greenhouses the total width should not exceed __m for well distribution of air.

Answer 14

50m ; 50m

Question 15

The eave height for a gable roof greenhouse shall be at least __ m with a minimum gable height of __ m.

Answer 15

1.70m ; 2.4m

Question 16

Large vent openings provide the most ventilation, the total vent area should be __%-__% of the floor area.

Answer 16

15% to 25%

Question 17

The recommended drainage rate is __%-__% of the water dose given to the
plant. The drained water should be contained in a storage tank.

Answer 17

30 to 50%