#20.
The main composition of the solid phase of inorganic matter are ______________.
A
rocks and minerals
B
sand, gravel and clay
C
sand, silt & clay
D
sand, air and water
Answer: sand, silt & clay
#21.
It is the mode of origin of the soil with special reference to the processes of soil forming factors
responsible for the development of the solum or true soil from the unconsolidated parent
material.
A
orogenesis
B
Soil development
C
Soil profile
D
Soil genesis
Answer: Soil genesis
#22.
It is the mechanical breakdown of rocks and minerals into smaller bits or the unconsolidated
materials.
A
Abrasion
B
Chemical weathering
C
Physical weathering
D
Exfoliation
Answer: Physical weathering
#23.
It is the decomposition of rocks and minerals forming new products or the synthesis of new
minerals.
A
Physical weathering
B
Exfoliation
C
Abrasion
D
Chemical weathering
Answer: Chemical weathering
#24.
It is a weathering process where water is the principal agent dissolving potash feldspar
producing aluminosolicates or the precursors of clays.
A
hydration
B
Chemical weathering
C
Physical weathering
D
hydrolysis
Answer: hydrolysis
#25.
These are rocks formed from the cooling and solidification of magma and that has not been
changed appreciably since its formation.
A
Metamorphic
B
Sedimentary
C
Salt Rock
D
Igneous
Answer: Igneous
#26.
These are formed from materials deposited from suspension or precipitated from solution and
usually being more or less consolidated.
A
Igneous Rock
B
Metamorphic Rock
C
Sedimentary Rock
D
Salt Rock
Answer: Sedimentary Rock
#27.
These have been greatly altered from their previous conditions through the combined action of
heat and pressure.
A
Igneous Rock
B
Salt Rock
C
Sedimentary Rock
D
Metamorphic Rock
Answer: Metamorphic Rock
#28.
It is a metamorphic rock produced from limestone
A
Gold
B
Gneiss
C
Marble
D
Slate
Answer: Marble
#29.
Essential elements derived from air and water
A
C, S and H
B
N, S and C
C
N, C and S
D
C, O and H
Answer: C, O and H
#30.
When nutrients dissolved in water are transported to the root surface, the mechanism is _________________________.
A
Root interception
B
Diffusion
C
Mass flow
D
Contact exchange
Answer: Mass flow
#31.
When nutrients are mobile, deficiency symptoms will be observed first in ________________.
A
Youngest leaves
B
Senescent leaves
C
Oldest leaves
D
Stems
Answer: Oldest leaves
#32.
Which of these elements is available to plants in anionic form?
A
Ca
B
Mg
C
Fe
D
P
Answer: P
#33.
The micronutrient involved in the translocation of sugar in plant.
A
Copper
B
Boron
C
Calcium
D
Potassium
Answer: Potassium
#34.
The process that renders P available to plants
A
Fixation
B
Nitrification
C
Solubilization
D
Ammonification
Answer: Solubilization
#35.
A physical effect of lime
A
Increase the cation exchange capacity
B
Enhance decomposition of organic matter
C
Increase water holding capacity of soil
D
Increase P availability
Answer: Increase water holding capacity of soil
#36.
A term for the initial application of fertilizer for crops.
A
Top dressing
B
Basal application
C
Band application
D
Side dressing
Answer: Basal application
#37.
An example of a liming material.
A
CaSO4
B
MgCl2
C
Ca(OH)2
D
MgSO4
Answer: Ca(OH)2
#38.
It is the amount of lime to be applied to the soil in order to increase its soil pH.
A
Relative neutralizing power
B
Analysis grade
C
Fertilizer recommendation
D
Lime requirement
Answer: Lime requirement
#39.
It is a mixture of animal excreta and soiled beddings that accumulates in stables or barns.