#1
Which of the following is a major component of soil?
Water
Air
Minerals
All of the above
#2
What is erosion?
The process of soil formation
The wearing away of soil and rock by natural forces
The process of decomposition of organic matter in the soil
The process of sedimentation
#3
What is humus?
A type of soil erosion
Decomposed organic matter in soil
A soil conservation method
A type of soil mineral
#4
Which soil type has the smallest particles?
Sandy soil
Loamy soil
Clay soil
Peaty soil
#5
Which soil conservation method involves planting trees or shrubs to reduce wind erosion?
Terracing
Strip cropping
Windbreaks
Contour plowing
#6
What is the term for the layer of soil where roots grow and most biological activity occurs?
Topsoil
Subsoil
Parent material
Bedrock
#7
Which of the following farming practices helps in preventing soil erosion?
Monoculture farming
Tillage farming
Crop rotation
Overgrazing
#8
What is terracing in agriculture?
Growing crops in elevated beds
The practice of rotating crops
Building ridges in the field
Creating flat areas on steep slopes to reduce soil erosion
#9
What is the optimal pH range for most plants to grow in soil?
#10
Which of the following is NOT a method of soil conservation?
Contour plowing
Strip cropping
Deforestation
Windbreaks
#11
Which soil conservation practice involves leaving the land unplowed and planting crops in the residue from the previous year's crops?
Terracing
Conservation tillage
Crop rotation
Strip cropping
#12
What is the process by which water moves downward in the soil called?
Evaporation
Percolation
Condensation
Transpiration
#13
What is the primary cause of soil pollution?
Pesticides
Deforestation
Industrial waste
Acid rain
#14
What is the primary cause of soil salinization?
Overuse of fertilizers
Deforestation
Excessive irrigation
Acid rain
#15
What is the term for the layer of soil that is affected by leaching?
Topsoil
Subsoil
Leachate
Solum
#16
Which of the following is NOT a method of soil remediation?
Bioremediation
Phytoremediation
Strip mining
Soil vapor extraction
#17
Which of the following is NOT a soil horizon?
O horizon
C horizon
E horizon
X horizon