Past paper June 2021 Flashcards
What does the ridge of a glasshouse do?
joins both sections of the glasshouse roof
Provides strength to the roof
what is the purpose of the ridge ventilator in a glasshouse?
allows warm air to escape and provides adequate ventilation
what is the purpose of internal frameworks of a glasshouse?
provides strength to the roof and sides of the structure
what is the purpose of a gutter?
to remove and harvest rainwater
what is the purpose of a louvred ventilator?
allows cool air to enter the structure
name some cladding materials of a glasshouse
horticultural glass
twin walled polycarbonate cladding
what is the purpose of a side ventilator on a glasshouse?
it is an opening ventilator that allows cool air to enter the glasshouse
what is the purpose of polythene cladding on a polytunnel?
is is a skin with UV stabilisers - this helps extend the life of the polythene
why do we use wooden frames doors on polytunnels?
they provide ventilation in a walk-in tunnel
why is there Netlon skirts/side ventilation on polytunnels?
they provide additional ventilation
for a grower growing crops under protection, list 5 environmental factors that the grower has to consider when growing crops under protection.
air temp soil temp availability of water relative humidity carbon dioxide concentration natural light air movement
for a grower growing crops under protection, state one way these environmental factors can be manipulated: AIR TEMPERATURE
can be raised by the use of heating
can be lowered by the use of ventilation, shading or damping down.
for a grower growing crops under protection, state one way these environmental factors can be manipulated; SOIL TEMPERATURE
soil warming cables or hot water pipes in glasshouse beds/benches can be used
for a grower growing crops under protection, state one way these environmental factors can be manipulated ; AVAILABILITY OF WATER
PROVIDE IRRIGATION EITHER OVERHEAD OR AT GROUND LEVEL -
use pipes, seep/drip hoses.
Good soil texture, structure and depth will also effect water availability.
for a grower growing crops under protection, state one way these environmental factors can be manipulated; RELATIVE HUMIDITY
Damping down or the use of a humidifier will raise the humidity
Ventilation will lower the humidity in a glasshouse
for a grower growing crops under protection, state one way these environmental factors can be manipulated; CARBON DIOXIDE CONCENTRATION
Good air movement through ventilation, and enriching the atmosphere with C02 gas will increase the concentration of it in a glasshouse
for a grower growing crops under protection, state one way these environmental factors can be manipulated; NATURAL LIGHT
through design and orientation,
cleanliness of glass
lack of shading
for a grower growing crops under protection, state one way these environmental factors can be manipulated; AIR MOVEMENT
provide adequate ventilation through the layout and size of the ventilators, and plant spacing
for decorative plant pots grown in a protected environment, NAME TWO PESTS
glasshouse whitefly vine weevil Two spotted spider mite scale insect Mealy Bug
for decorative plant pots grown in a protected environment, NAME TWO DISEASES
Botrytis
Powdery mildew
Root rot
Downy Mildew
state the symptoms of damage caused by the glasshouse whitefly
distortion of growing tip
presence of honeydew and sooty mould
state the symptoms of damage caused by ; VINE WEEVIL
larvae eat roots so plant growth becomes stunted
Plant wilts and becomes chlorotic
Adults chew irregular notches in the leaf margins
state the symptoms of damage caused by ; botrytis
A fuzzy, grey mould develops on buds, flowers, soft tissue and fruits
state the symptoms of damage caused by ; powdery mildew
A dry, powdery, grey-white fungal bloom on the upper surface of leaves, shoots and flowers in spring.
This leads to red blotches on the leaf surface which then curls upwards
