WorksheetsTopic 5 Mulches
Total questions: 33
Worksheet time: 17mins
What is the primary purpose of mulching?
To decorate garden paths
To save water, suppress weeds, and improve the soil
To attract insects to the garden
To increase the temperature of the soil
How does mulch help plants in winter?
By attracting more sunlight
By keeping the soil warm
By preventing weeds from growing and protecting plant roots
By increasing soil nutrients
What are mulches?
Plants used for decoration
Loose coverings or sheets of material placed on the surface of soil
Tools used for planting
Fertilizers that boost plant growth
What does mulching provide that is beneficial for soil health?
Improve soil organic matter
Remove topsoil layer
Decrease nutrient availability
Attract harmful soil organisms
What is one of the aesthetic benefits of mulching?
It can change the color of the plants
It gives a decorative finish
It increases the size of the plants
It changes the texture of the soil
What do both biodegradable and non-biodegradable mulches have in common?
They both fertilize the soil
They both increase evaporation from the soil surface
They both block sunlight needed for weed seeds to germinate and grow
They both are made from organic materials
What is the purpose of biodegradable mulches ?
To protect the soil from pests
To release nutrients into the soil and improve its structure
To prevent sunlight from reaching the soil
To add decorative elements to the garden
When should the layers of biodegradable mulches be replaced?
After one growing season
When the material has fully rotted down
Every month
Once a year regardless of the condition
Which of the following is NOT listed as one of the best materials for biodegradable mulches?
Garden compost
Processed conifer bark
Plastic sheeting
Leaf mould
What is specifically mentioned as a caution when using spent hops as a mulch?
It can attract rodents
It is poisonous if eaten by dogs
It can cause plant diseases
It is not suitable for vegetable gardens
What is a downside of using sheet mulches or woven landscape fabric?
They boost the fertility of the soil
They do not look very attractive
They are not permeable
They reflect sunlight
When are mulches best applied?
Early spring and winter
Mid- to late spring, when annual weeds have not yet germinated and autumn
Summer and early autumn
Late autumn and early winter
Why should mulches be applied around new plantings?
To add nutrients to the soil
To increase soil temperature
To benefit from weed suppression and moisture retention in the soil
When mulching beds and borders, what should be avoided?
Mulching entirely
Smothering low growing plants
Using biodegradable mulches
Planting through mulch sheets
What is the minimum thickness effective biodegradable mulches should have?
2cm
5cm
7.5cm
10cm
When is the best time to lay mulches over the soil?
When the soil is frozen
Before removing weeds
After removing weeds, when the soil is not frozen
After a heavy rain
For single trees and specimen shrubs, how should mulching be applied?
To the radius of the canopy
Over the entire plant
Directly on the stem
Only around the base
What is a benefit of biodegradable mulch as it decomposes over time?
It increases the need for additional soluble feed
It can smother low growing plants
It feeds plants and microorganisms in the soil
It requires frequent reapplication
Why might ground covering Mediterranean plants like Thymus species be best left unmulched?
They need a lot of sunlight
They can hold too much moisture around the stems and foliage
They prefer acidic soil
They are prone to weed infestation
What is one of the dangers of applying mulch too close to plant stems?
It can attract beneficial insects to the plant.
It can lead to rot and disease due to moisture retention.
It can increase the air flow around the plant stem.
It can make the plant stem more resistant to pests.
Which pest problem can mulch close to plant stems cause?
It can repel pests such as rodents, snails, and slugs.
It can attract predators that eat harmful pests.
It can provide cover and shelter for pests like rodents, snails, and slugs.
It can reduce the number of insects in the garden.
What is stem suffocation in the context of mulching?
Enhancing the oxygen supply to the plant stem.
Applying a thin layer of mulch to improve plant health.
Applying too much mulch or piling it up against the plant stem, restricting air flow.
Using mulch to protect the stem from cold temperatures.
What can temporarily tie up or immobilize nutrients in the soil, making them unavailable to plants in the long term?
Fertilizers
Pesticides
Mulch
Compost
What happens when organic mulch such as leaves, wood chips, or straw breaks down?
It consumes soil moisture.
It releases nutrients into the soil.
It increases soil acidity.
It reduces microbial activity in the soil.
Why is nitrogen temporarily unavailable to plants during the initial decomposition process of organic mulch?
Because it is washed away by rain.
Because it is used by plants immediately.
Because soil microbes consume it to break down the organic material.
Because it evaporates into the atmosphere.
Why is nitrogen immobilization generally not a significant problem when the soil is already rich in nitrogen?
Because the excess nitrogen is harmful to plants.
Because the nitrogen will become available to plants as the organic material breaks down further.
Because nitrogen-rich soil repels pests.
Because plants do not need nitrogen when the soil is rich in other nutrients.
What is one of the benefits of adding organic mulch to soil?
It decreases soil organic matter.
It reduces the availability of nutrients over the long term.
It promotes beneficial microbial activity in the soil.
It permanently immobilizes nutrients.
Why is it less important to choose the type of organic material for mulching compared to the thickness of the layer applied?
Thicker layers are more cost-effective
Thicker layers block sunlight from weeds, insulate the soil better, and reduce water evaporation
Thicker layers prevent the growth of honey fungus
Thicker layers make the garden look more aesthetically pleasing
What should you do if you have freshly chipped material such as woody prunings or grass clippings?
Use it immediately to encourage microorganisms in the soil
Keep it stored for a few weeks before using
Spread it around plants as a form of fertilizer
Mix it with gravel to prevent weed growth
What should you do if you find white fungal mycelium in soil that has been covered with an organic mulch?
Remove the mulch immediately
Apply chemical treatments to the soil
Worry about plant health as it is a harmful sign
Do nothing as it is harmless and there is no need to dig out the mulch
For coarser mulches such as wood chips or bark, what is the typically recommended depth?
1-2 inches (2.5-5 cm)
2-3 inches (5-7 cm)
3-4 inches (7-10 cm)
4-5 inches (10-12.5 cm)
What is the formula to calculate how much mulch is required per square meter at a specific depth?
Mulch Required = Width x Depth
Mulch Required = Length x Depth
Mulch Required = Area x Depth
Mulch Required = Area + Depth
If you want to cover an area of 10 m² with a depth of 5 cm of mulch, how much mulch would you need in cubic meters?
0.05 cubic meters
0.5 cubic meters
5 cubic meters
50 cubic meters
