WorksheetsUnit 9 Soils and Hydroponics
Total questions: 15
Worksheet time: 8mins
An example of plant-growing media is
soil
perlite
water
all of the above
Which is NOT organic matter?
leaf mold
peat moss
sphagnum moss
vermiculite
Decay of organic matter is caused by
large animals
microbes
rodents
water
Which is NOT a factor affecting soil formation?
hydroponics
gravity
ice
water
Humans affect soil formation by
landscaping
irrigating
bulldozing
weathering
The land class with the fewest limitations is
Class I
Class III
Class VI
Class VIII
The land classes suitable for field crop production are
I, II, IV and VI
I, II, III and IV
I, IV, V and VIII
I, II, VI and VII
The horizon that is most supportive of plant growth is
horizon O
horizon A
horizon B
horizon C
The smallest soil particle is
clay
gravel
sand
silt
A term related to soil structure is
aggregate
loam
silt
topsoil
Soil pH is generally increased by adding
sulfur
nitrogen
lime
complete fertilizer
Hydroponics refers to
aggregate culture
aeroponics
nutriculture
all of the above
The importance and use of hydroponics is
increasing
decreasing
about the same
a new field
Hydroponically grown plants differ principally from soil-grown plants by
light requirements
nutrient requirements
oxygen requirements
support mechanisms
The best and most economical light source for growing plants hydroponically is
incandescent light
fluorescent light
sodium
sunlight
