Louisiana Horticulture Test Study Guide
/ Actual Questions & Answers For
Guaranteed Pass / Newest Update
1. Which of the following soil textures holds the most water?
A. Sand
B. Clay
C. Loam
D. Silt
2. What is the primary benefit of adding organic matter to soil?
A. Increases pH
B. Promotes weed growth
C. Improves soil structure and water retention
D. Makes the soil more compact
3. What is the optimal pH range for most horticultural crops?
A. 3.5 – 4.5
B. 6.0 – 7.0
C. 7.5 – 8.5
D. 9.0 – 10.0
4. In Louisiana, a licensed horticulturist must renew their license every:
A. 6 months
B. 1 year
C. 2 years
D. 5 years
,5. What is the function of phosphorus in plant growth?
A. Stimulates leaf development
B. Encourages root and flower development
C. Increases resistance to insects
D. Controls pH
6. Which type of insecticide is considered systemic?
A. Pyrethrin
B. Imidacloprid
C. Rotenone
D. Diatomaceous Earth
7. What is the best time to prune azaleas in Louisiana?
A. Just after they finish blooming in spring
B. Mid-summer
C. Fall
D. During winter dormancy
8. What is the name of the Louisiana agency that regulates horticulture
licenses?
A. Louisiana Department of Environment
B. Louisiana Landscaping Bureau
C. Louisiana Department of Agriculture and Forestry (LDAF)
D. Louisiana Board of Contractors
9. Which of the following irrigation systems is most water-efficient for
landscape beds?
A. Overhead sprinkler
B. Drip irrigation
C. Soaker hose
D. Manual watering
10. Which part of the plant is responsible for photosynthesis?
A. Roots
B. Leaves
C. Flowers
D. Bark
, 11. What type of weed is Crabgrass classified as?
A. Broadleaf perennial
B. Annual grassy weed
C. Biennial broadleaf
D. Woody shrub
12. What deficiency causes chlorosis in older leaves first?
A. Nitrogen
B. Iron
C. Magnesium
D. Calcium
13. What is the primary concern with using herbicides near tree roots?
A. May increase fungal growth
B. Encourages weed resistance
C. Can cause tree root damage and uptake toxicity
D. Makes the tree grow faster
14. How deep should most shrubs be planted in the ground?
A. 6 inches deeper than the root ball
B. At the same depth as in the container or slightly higher
C. Only roots should be visible
D. 3 inches above ground level
15. What does “IPM” stand for in pest control?
A. Integrated Plant Movement
B. Insect Population Management
C. Integrated Pest Management
D. Insecticide Prevention Methods
16. Which nutrient promotes strong stem and cell wall development?
A. Nitrogen
B. Phosphorus
C. Potassium
D. Boron
17. What is the most common cause of lawn thatch buildup?
A. Overuse of high-nitrogen fertilizer
/ Actual Questions & Answers For
Guaranteed Pass / Newest Update
1. Which of the following soil textures holds the most water?
A. Sand
B. Clay
C. Loam
D. Silt
2. What is the primary benefit of adding organic matter to soil?
A. Increases pH
B. Promotes weed growth
C. Improves soil structure and water retention
D. Makes the soil more compact
3. What is the optimal pH range for most horticultural crops?
A. 3.5 – 4.5
B. 6.0 – 7.0
C. 7.5 – 8.5
D. 9.0 – 10.0
4. In Louisiana, a licensed horticulturist must renew their license every:
A. 6 months
B. 1 year
C. 2 years
D. 5 years
,5. What is the function of phosphorus in plant growth?
A. Stimulates leaf development
B. Encourages root and flower development
C. Increases resistance to insects
D. Controls pH
6. Which type of insecticide is considered systemic?
A. Pyrethrin
B. Imidacloprid
C. Rotenone
D. Diatomaceous Earth
7. What is the best time to prune azaleas in Louisiana?
A. Just after they finish blooming in spring
B. Mid-summer
C. Fall
D. During winter dormancy
8. What is the name of the Louisiana agency that regulates horticulture
licenses?
A. Louisiana Department of Environment
B. Louisiana Landscaping Bureau
C. Louisiana Department of Agriculture and Forestry (LDAF)
D. Louisiana Board of Contractors
9. Which of the following irrigation systems is most water-efficient for
landscape beds?
A. Overhead sprinkler
B. Drip irrigation
C. Soaker hose
D. Manual watering
10. Which part of the plant is responsible for photosynthesis?
A. Roots
B. Leaves
C. Flowers
D. Bark
, 11. What type of weed is Crabgrass classified as?
A. Broadleaf perennial
B. Annual grassy weed
C. Biennial broadleaf
D. Woody shrub
12. What deficiency causes chlorosis in older leaves first?
A. Nitrogen
B. Iron
C. Magnesium
D. Calcium
13. What is the primary concern with using herbicides near tree roots?
A. May increase fungal growth
B. Encourages weed resistance
C. Can cause tree root damage and uptake toxicity
D. Makes the tree grow faster
14. How deep should most shrubs be planted in the ground?
A. 6 inches deeper than the root ball
B. At the same depth as in the container or slightly higher
C. Only roots should be visible
D. 3 inches above ground level
15. What does “IPM” stand for in pest control?
A. Integrated Plant Movement
B. Insect Population Management
C. Integrated Pest Management
D. Insecticide Prevention Methods
16. Which nutrient promotes strong stem and cell wall development?
A. Nitrogen
B. Phosphorus
C. Potassium
D. Boron
17. What is the most common cause of lawn thatch buildup?
A. Overuse of high-nitrogen fertilizer
