Nevada Agricultural Crop Advisor
Certification Exam Practice Questions
And Correct Answers (Verified Answers)
Plus Rationales 2026 Q&A | Instant
Download Pdf
1. Which of the following soil properties most directly affects water
infiltration and retention for crops?
A. Soil color
B. Soil texture
C. Soil temperature
D. Soil pH
B. Soil texture
Soil texture, determined by the proportion of sand, silt, and clay,
directly influences water infiltration and retention because finer
textures hold water better while coarser textures drain more quickly.
2. What is the primary purpose of crop rotation in sustainable
agriculture?
A. Increase pesticide use
B. Reduce soil fertility
C. Manage pests and improve soil health
D. Reduce crop yields
C. Manage pests and improve soil health
Crop rotation helps break pest and disease cycles and enhances soil
fertility by alternating crops with different nutrient requirements and
rooting depths.
3. Which nutrient is most commonly deficient in Nevada soils for high-
yield crop production?
, A. Nitrogen
B. Phosphorus
C. Potassium
D. Calcium
A. Nitrogen
Nitrogen is often the limiting nutrient in arid regions like Nevada, as
it is highly mobile and can be depleted quickly without
replenishment.
4. Which irrigation method is most efficient for minimizing water loss in
arid regions?
A. Furrow irrigation
B. Sprinkler irrigation
C. Drip irrigation
D. Flood irrigation
C. Drip irrigation
Drip irrigation delivers water directly to the plant root zone, reducing
evaporation and runoff, which is critical in water-limited
environments like Nevada.
5. Which pest management strategy focuses on the biological control of
crop pests?
A. Chemical pesticides
B. Crop rotation
C. Integrated pest management
D. Biological control agents
D. Biological control agents
Biological control uses natural predators, parasites, or pathogens to
manage pest populations, reducing reliance on chemical pesticides.
6. What is the main advantage of using cover crops in agricultural
systems?
A. Increase soil erosion
B. Reduce soil fertility
C. Improve soil structure and reduce erosion
D. Decrease water infiltration
C. Improve soil structure and reduce erosion
, Cover crops protect the soil from erosion, add organic matter,
enhance soil structure, and can suppress weeds.
7. Which soil test is commonly used to determine nutrient availability for
crops?
A. Soil texture test
B. Soil pH test
C. Soil nutrient analysis
D. Soil color assessment
C. Soil nutrient analysis
Soil nutrient analysis measures essential macronutrients and
micronutrients to guide fertilizer applications and optimize crop
production.
8. Which of the following crop diseases is caused by a fungal pathogen?
A. Bacterial leaf spot
B. Downy mildew
C. Root-knot nematode
D. Viral mosaic
B. Downy mildew
Downy mildew is caused by oomycete fungi that infect leaves and
reduce photosynthetic capacity, often under moist conditions.
9. Which practice helps prevent soil salinization in irrigated agriculture?
A. Over-irrigation
B. Use of saline water
C. Proper drainage and leaching
D. Reducing organic matter
C. Proper drainage and leaching
Salts accumulate in the soil when water evaporates; leaching with
adequate drainage removes excess salts and prevents salinization.
10. What is the primary function of nitrogen in plants?
A. Energy transfer
B. Root development
C. Protein and chlorophyll synthesis
D. Pest resistance
C. Protein and chlorophyll synthesis
Certification Exam Practice Questions
And Correct Answers (Verified Answers)
Plus Rationales 2026 Q&A | Instant
Download Pdf
1. Which of the following soil properties most directly affects water
infiltration and retention for crops?
A. Soil color
B. Soil texture
C. Soil temperature
D. Soil pH
B. Soil texture
Soil texture, determined by the proportion of sand, silt, and clay,
directly influences water infiltration and retention because finer
textures hold water better while coarser textures drain more quickly.
2. What is the primary purpose of crop rotation in sustainable
agriculture?
A. Increase pesticide use
B. Reduce soil fertility
C. Manage pests and improve soil health
D. Reduce crop yields
C. Manage pests and improve soil health
Crop rotation helps break pest and disease cycles and enhances soil
fertility by alternating crops with different nutrient requirements and
rooting depths.
3. Which nutrient is most commonly deficient in Nevada soils for high-
yield crop production?
, A. Nitrogen
B. Phosphorus
C. Potassium
D. Calcium
A. Nitrogen
Nitrogen is often the limiting nutrient in arid regions like Nevada, as
it is highly mobile and can be depleted quickly without
replenishment.
4. Which irrigation method is most efficient for minimizing water loss in
arid regions?
A. Furrow irrigation
B. Sprinkler irrigation
C. Drip irrigation
D. Flood irrigation
C. Drip irrigation
Drip irrigation delivers water directly to the plant root zone, reducing
evaporation and runoff, which is critical in water-limited
environments like Nevada.
5. Which pest management strategy focuses on the biological control of
crop pests?
A. Chemical pesticides
B. Crop rotation
C. Integrated pest management
D. Biological control agents
D. Biological control agents
Biological control uses natural predators, parasites, or pathogens to
manage pest populations, reducing reliance on chemical pesticides.
6. What is the main advantage of using cover crops in agricultural
systems?
A. Increase soil erosion
B. Reduce soil fertility
C. Improve soil structure and reduce erosion
D. Decrease water infiltration
C. Improve soil structure and reduce erosion
, Cover crops protect the soil from erosion, add organic matter,
enhance soil structure, and can suppress weeds.
7. Which soil test is commonly used to determine nutrient availability for
crops?
A. Soil texture test
B. Soil pH test
C. Soil nutrient analysis
D. Soil color assessment
C. Soil nutrient analysis
Soil nutrient analysis measures essential macronutrients and
micronutrients to guide fertilizer applications and optimize crop
production.
8. Which of the following crop diseases is caused by a fungal pathogen?
A. Bacterial leaf spot
B. Downy mildew
C. Root-knot nematode
D. Viral mosaic
B. Downy mildew
Downy mildew is caused by oomycete fungi that infect leaves and
reduce photosynthetic capacity, often under moist conditions.
9. Which practice helps prevent soil salinization in irrigated agriculture?
A. Over-irrigation
B. Use of saline water
C. Proper drainage and leaching
D. Reducing organic matter
C. Proper drainage and leaching
Salts accumulate in the soil when water evaporates; leaching with
adequate drainage removes excess salts and prevents salinization.
10. What is the primary function of nitrogen in plants?
A. Energy transfer
B. Root development
C. Protein and chlorophyll synthesis
D. Pest resistance
C. Protein and chlorophyll synthesis
