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