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LHAP Year 2-3 > Growing Facilities > Flashcards

Growing Facilities Flashcards

1
Q

A rule of thumb is that greenhouses should be kept ? meters away from unavoidable obstruction

A

2.5m

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2
Q

What structure can be used for propagating plant material and overwintering plants

A

Cold frame

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3
Q

A second application of film plastic between layers will?

A

Decrease the rate of heat loss

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4
Q

What watering system is most efficient for irrigating crops indoors and outdoors

A

Drip irrigation

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5
Q

What is the most important control measure to take when recycling drain water

A

Filter and disinfect

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6
Q

What is the most important reason to overwinter container stock in an insulated environment

A

Insulate roots and keep moisture in.

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7
Q

Which gable end structure allows for the best support of overhead equipment and crops

A

Post-truss

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8
Q

Prevailing wind direction and velocity effect what in greenhouse planning

A

Ventilation, heating, loads.

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9
Q

Shade/lath houses can be used to modify which environmental components

A

Temperature modification, reduce transportation loss and reduce light intensity

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10
Q

The simplest way to store plants through the winter is

A

Heeling-in

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11
Q

Why is it important to recycle water in a greenhouse

A

Efficient use of water, recycle nutrients, and reduce impact on environment

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12
Q

What is the most common way to purify and disinfect water in a greenhouse

A

Reverse Osmosis

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13
Q

The bench arrangement that gives the greatest amount of bench space per floor area with fixed benches is

A

Peninsula

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14
Q

Tree producers will use ? To harden off trees that have been dug or transplanted during the growing season

A

Poly-houses

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15
Q

The most vital utility for successful greenhouse production is

A

Water quality

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16
Q

What is important before placing plants in a microfoam tunnels?

A

Plants are dormant and well watered

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17
Q

Which glazing will last the longest?

A

Tempered glass

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18
Q

Adequate air circulation requires ? The total volume of the greenhouse to be unoccupied

A

1/3

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19
Q

What loads are considered live loads

A

Wind, snow, and crop loads

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20
Q

What is the minimum distance a greenhouse should be placed from a shelterbelt

A

30m

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21
Q

What method can be used to control the soil environment in the field

A

Organic mulch

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22
Q

Are water collection pits essential to prevent groundwater contamination

A

Yes

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23
Q

Dead load calculations would include

A

Steel framing members

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24
Q

In order to avoid excessive snow load; to provide a safe distance if trees fall, it’s is recommended to place buildings at ? Times the height of the tallest row away

A

2 times away; 20 meters

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25
Q

What glazing material is most economical in both cost and installation

A

Co-polymers

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26
Q

What is the term for shadows cast by structural components that result in crop exposure that is not uniform

A

Static shadows

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27
Q

Stratification is especially a problem with which style of greenhouse

A

Gothic arch

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28
Q

Benches are cooler than the floor below them

A

No

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29
Q

Aluminum alloys mine advantage over galvanized steel as a structural member is

A

Lighter weight

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30
Q

Gutter connected greenhouses should be oriented what direction for maximum light transmission

A

North-south

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31
Q

What are concerns when growing in field soil

A

Weed problems, soil texture & structure, and pesticide residue.

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32
Q

Poly houses are primarily used for one specific species, which is?

A

Evergreens

33
Q

Crazing from hail impact is a common problem for

A

Fiberglass

34
Q

When assessing a property, what is the number one objective

A

Maximize environmental conditions

35
Q

What tool can be used to monitor climate in an overwintering storage facility

A

Thermostat

36
Q

The glazing that allows primarily direct transmission is

A

Glass

37
Q

Aisle width in a greenhouse can vary from 45cm - to 120cm

A

Yes

38
Q

What is the most important water source on the prairies is

A

Dugouts

39
Q

Plants that are laid on their sides and piled to predetermined height would be placed under what kind of storage structure

A

Microfoam tunnel

40
Q

If the distance from ridge to either sidewall of a greenhouse is equal in length, the greenhouse is considered

A

Evenspan

41
Q

What fertilization method is most commonly used in the greenhouse

A

Fertigation

42
Q

When is the best time to till a field

A

Fall

43
Q

Under row covers warm season crops will

A

Mature 1-2 weeks earlier.

44
Q

Which organic mulch has the most advantages

A

Wood chips

45
Q

When is tbe most effective time to control perennial weeds in the field

A

Spring

46
Q

Summer annual weeds are best controlled in

A

In the fall

47
Q

Three important practices used in IPM to maintain effective control of insects and disease are

A

Education, monitoring, identification

48
Q

What is a reason for post-planting tillage

A

To expose perennial roots and crowns to winter desiccation

49
Q

How often should field soil be tested

A

3-5 years

50
Q

Is record keeping unimportant in IPM

A

No. It is very important. You won’t know if your IPM an is working without records.

51
Q

Which nutrient is usually most limited and leached easily from the soil

A

Nitrogen

52
Q

When is the best time to work Phosphorus into the soil

A

Prior to planting

53
Q

Slow release plus a liquid fertilizer should be used at what rate?

A

Half the rate

54
Q

The till depth for the addition of OM is

A

10-12”

55
Q

All fertilizers in Canada are sold as a ? Which guarantees the min % of NPK by weight

A

Grade

56
Q

Water soluble fertilizers are used with

A

Fertilizer injector system

57
Q

What are the specific requirements for the breakdown of organic fertilizer in soil

A

Warm and moist soil

58
Q

Which micronutrient is the most deficient in prairie soils

A

Iron

59
Q

How far away from the base of plants should sidedressing be done to work the nutrients into the soil

A

15-25cm

60
Q

Is MagAmp a type of slow release fertilizer

A

Yes

61
Q

What is a disadvantage of blended fertilizer

A

Limited to the nutrient ratios provided

62
Q

A field soil deficient in N would require

A

20-25lbs of N/acre

63
Q

What percentage of bleach should be used to sterilize pots & containers

A

10%

64
Q

A broad spectrum disinfectant used in greenhouses is

A

Vikron

65
Q

How long should you allow surfaces in a greenhouse to dry after disinfecting them with 10% bleach

A

24hrs

66
Q

A product used to disinfect and preserve wood benches in a greenhouse is

A

Copper Naphthenate

67
Q

Which environmental control system is least likely to be automated?

A

Watering systems

68
Q

An indicator of Carbon Monoxide production in the greenhouse that can be seen in a CO2 burner is

A

Orange flame

69
Q

What stage of growth is bottom heat as a temperature control most valuable

A

Seedlings

70
Q

Carbon monoxide levels are toxic at what ppm to plants and humans

A

500ppm to plants and 50ppm to humans

71
Q

At standard crop height a carbon dioxide sensor should be located at

A

Canopy level

72
Q

Suspended particles and hard water present a problem primarily in

A

Drip irrigation systems

73
Q

The three main components of an environmental control system are

A

The sensor, controller and process equipment

74
Q

A fan system that includes an intake on one end to draw air in, with shutters opening on the other end to create positive air flow is a

A

Endwall exhaust

75
Q

A system that is capable of reducing air temperature inside the greenhouse below ambient outside temperature is

A

Cooling

76
Q

HAF stands for

A

Horizontal Action Fan

77
Q

Thermostat sensors for heaters should be located at

A

Crop level

78
Q

Greenhouse applications for forced air systems are localized

A

Yes

79
Q

Sensors should be shaded from direct sun, set in a vented sensor box, be painted white to reflect heat and may have a small fan to draw air from the greenhouse over them

A

TRUE

LHAP Year 2-3 (12 decks)

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