How to Cultivate Plums - Exam
  • 1. What type of climate is generally best for growing plums?
A) Temperate
B) Arctic
C) Desert
D) Tropical
  • 2. What is the ideal soil pH for plum trees?
A) 6.0-7.0
B) 7.5-8.5
C) 8.5-9.5
D) 4.0-5.0
  • 3. Plum trees need how many hours of chill hours (below 45°F) for proper fruit production?
A) 0-100
B) Varies by variety
C) 1000+
D) None
  • 4. Which of the following is the MOST important factor when choosing a plum tree variety?
A) Tree height
B) Fruit color
C) Leaf shape
D) Climate suitability
  • 5. What is the best time of year to plant bare-root plum trees?
A) Late fall
B) Mid-summer
C) Anytime
D) Late winter/early spring
  • 6. What spacing is recommended for planting standard-sized plum trees?
A) 2-3 feet
B) 30-40 feet
C) 15-20 feet
D) 5-10 feet
  • 7. What is the primary purpose of staking a young plum tree?
A) Attract pollinators
B) Prevent diseases
C) Increase fruit yield
D) Provide support
  • 8. During the first year, how often should a newly planted plum tree be watered?
A) Only during rainfall
B) Once a month
C) Daily
D) Regularly, when topsoil is dry
  • 9. Why is it important to prune plum trees?
A) To promote air circulation and fruit production
B) To make the tree look aesthetically pleasing only
C) To discourage fruit production
D) To stunt growth
  • 10. What type of pruning cut encourages new growth outward?
A) Removing all buds
B) Cutting to an outward-facing bud
C) Cutting to an inward-facing bud
D) Cutting randomly
  • 11. What is 'thinning' in the context of plum tree care?
A) Adding fertilizer
B) Removing branches
C) Removing excess leaves
D) Removing excess fruit
  • 12. Why is thinning plums important?
A) To increase the number of plums
B) To attract more birds
C) To prevent the tree from growing too tall
D) To improve fruit size and quality
  • 13. Which of the following is a common pest of plum trees?
A) Plum curculio
B) Ladybugs
C) Earthworms
D) Butterflies
  • 14. Which of the following is a common disease of plum trees?
A) Powdery mildew
B) Brown rot
C) Green leaf disease
D) Black spot
  • 15. What is one organic method to control plum curculio?
A) Ignoring the problem
B) Kaolin clay spray
C) Bleach spray
D) Gasoline
  • 16. What type of fertilizer is generally recommended for plum trees?
A) High nitrogen fertilizer
B) No fertilizer
C) Weed killer
D) Balanced fertilizer
  • 17. When should you fertilize plum trees?
A) Late fall
B) Early spring
C) Winter
D) Mid-summer
  • 18. What is the purpose of mulching around a plum tree?
A) Prevent pollination
B) Attract pests
C) Suffocate the roots
D) Retain moisture and suppress weeds
  • 19. What type of mulch is best for plum trees?
A) Rocks
B) Plastic mulch
C) Gravel
D) Organic mulch like wood chips
  • 20. How can you tell when a plum is ripe?
A) Slightly soft to the touch and easily pulls from the tree
B) Falls off the tree easily
C) Hard as a rock
D) Completely green
  • 21. What is grafting?
A) Joining two plants together
B) Adding fertilizer
C) Watering deeply
D) Removing dead branches
  • 22. Why is grafting sometimes used in plum cultivation?
A) To kill the tree
B) To combine desirable traits
C) To make the tree taller
D) To prevent fruit production
  • 23. What does 'self-pollinating' mean for a plum tree?
A) It needs constant watering
B) It's resistant to all pests
C) It can produce fruit without another plum tree
D) It only produces green plums
  • 24. What is cross-pollination?
A) Self-pollination
B) Pollination between a plum and an apple tree
C) Pollination between two different plum varieties
D) Pollination using only wind
  • 25. How can you improve pollination for plum trees?
A) Keeping bees away
B) Spraying pesticides
C) Removing all flowers
D) Planting pollinator-attracting plants
  • 26. What is the first step you should take if you notice a disease on your plum tree?
A) Over-water the tree
B) Immediately cut down the tree
C) Identify the disease
D) Ignore it and hope it goes away
  • 27. What is the best way to store harvested plums?
A) Frozen immediately
B) In direct sunlight
C) In a warm, humid place
D) Refrigerated
  • 28. How long does it typically take for a newly planted plum tree to produce fruit?
A) Never
B) 1 year
C) 3-6 years
D) 10+ years
  • 29. What is the purpose of dormant oil spray on plum trees?
A) To make the leaves shiny.
B) To attract more birds.
C) To speed up fruit production.
D) To control overwintering pests and diseases.
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