LOUISIANA HORTICULTURE TEST GUIDE
QUESTIONS AND CORRECT ANSWERS (VERIFIED
ANSWERS) Q&A 2026|INSTANT DOWNLOAD PDF
1. Which plant process is responsible for food production
using sunlight?
A. Respiration
B. Photosynthesis
C. Transpiration
D. Germination
Rationale: Plants convert light energy into chemical energy
during photosynthesis.
Correct Answer: B
2. The primary function of roots is to:
A. Produce flowers
B. Absorb water and nutrients
C. Conduct photosynthesis
D. Store chlorophyll
Rationale: Roots mainly absorb water and minerals from soil.
Correct Answer: B
3. Which soil type drains water the fastest?
A. Clay
B. Silt
C. Sand
,D. Loam
Rationale: Sandy soils have large particles allowing rapid
drainage.
Correct Answer: C
4. The ideal soil pH for most horticultural plants is:
A. 2.0–4.0
B. 4.0–5.0
C. 6.0–7.0
D. 8.0–9.0
Rationale: Most plants prefer slightly acidic to neutral soil.
Correct Answer: C
5. What is the process of removing dead or unwanted plant
parts called?
A. Grafting
B. Pruning
C. Layering
D. Budding
Rationale: Pruning improves plant health and structure.
Correct Answer: B
6. Nitrogen in plants primarily promotes:
A. Root development
B. Leaf growth
,C. Flower production
D. Fruit ripening
Rationale: Nitrogen supports vegetative growth.
Correct Answer: B
7. Which tool is best for loosening compact soil?
A. Pruning shears
B. Trowel
C. Spade
D. Hoe
Rationale: A hoe breaks and loosens soil effectively.
Correct Answer: D
8. The male part of a flower is the:
A. Pistil
B. Ovary
C. Stamen
D. Sepal
Rationale: The stamen produces pollen.
Correct Answer: C
9. Germination requires all EXCEPT:
A. Water
B. Oxygen
C. Light (always required)
, D. Suitable temperature
Rationale: Some seeds germinate in darkness.
Correct Answer: C
10. Organic matter improves soil mainly by:
A. Increasing acidity only
B. Improving structure and fertility
C. Killing pests
D. Preventing photosynthesis
Rationale: Organic matter enhances soil quality.
Correct Answer: B
11. Which irrigation system delivers water directly to roots?
A. Flood irrigation
B. Sprinkler system
C. Drip irrigation
D. Overhead hose
Rationale: Drip irrigation targets root zones efficiently.
Correct Answer: C
12. Chlorosis in plants is caused by deficiency of:
A. Iron
B. Oxygen
C. Hydrogen
D. Carbon
QUESTIONS AND CORRECT ANSWERS (VERIFIED
ANSWERS) Q&A 2026|INSTANT DOWNLOAD PDF
1. Which plant process is responsible for food production
using sunlight?
A. Respiration
B. Photosynthesis
C. Transpiration
D. Germination
Rationale: Plants convert light energy into chemical energy
during photosynthesis.
Correct Answer: B
2. The primary function of roots is to:
A. Produce flowers
B. Absorb water and nutrients
C. Conduct photosynthesis
D. Store chlorophyll
Rationale: Roots mainly absorb water and minerals from soil.
Correct Answer: B
3. Which soil type drains water the fastest?
A. Clay
B. Silt
C. Sand
,D. Loam
Rationale: Sandy soils have large particles allowing rapid
drainage.
Correct Answer: C
4. The ideal soil pH for most horticultural plants is:
A. 2.0–4.0
B. 4.0–5.0
C. 6.0–7.0
D. 8.0–9.0
Rationale: Most plants prefer slightly acidic to neutral soil.
Correct Answer: C
5. What is the process of removing dead or unwanted plant
parts called?
A. Grafting
B. Pruning
C. Layering
D. Budding
Rationale: Pruning improves plant health and structure.
Correct Answer: B
6. Nitrogen in plants primarily promotes:
A. Root development
B. Leaf growth
,C. Flower production
D. Fruit ripening
Rationale: Nitrogen supports vegetative growth.
Correct Answer: B
7. Which tool is best for loosening compact soil?
A. Pruning shears
B. Trowel
C. Spade
D. Hoe
Rationale: A hoe breaks and loosens soil effectively.
Correct Answer: D
8. The male part of a flower is the:
A. Pistil
B. Ovary
C. Stamen
D. Sepal
Rationale: The stamen produces pollen.
Correct Answer: C
9. Germination requires all EXCEPT:
A. Water
B. Oxygen
C. Light (always required)
, D. Suitable temperature
Rationale: Some seeds germinate in darkness.
Correct Answer: C
10. Organic matter improves soil mainly by:
A. Increasing acidity only
B. Improving structure and fertility
C. Killing pests
D. Preventing photosynthesis
Rationale: Organic matter enhances soil quality.
Correct Answer: B
11. Which irrigation system delivers water directly to roots?
A. Flood irrigation
B. Sprinkler system
C. Drip irrigation
D. Overhead hose
Rationale: Drip irrigation targets root zones efficiently.
Correct Answer: C
12. Chlorosis in plants is caused by deficiency of:
A. Iron
B. Oxygen
C. Hydrogen
D. Carbon
