Benefits of Mulch Test

Benefits of Mulch Test
Please fill out your email address in the first box and your name, ISA cert. no. & specialty in the second box. Answer the questions below and when you are finished, press submit.

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Question: 1. Research has shown that an 8 foot circle of mulch under young trees can:
double tree root densities.
quadruple tree root densities.
increase fine root densities up to 10 times.
increase fine root densities up to 15 times.

Question: 2. Research has shown that proper mulching can:
reduce mycorrhizal activity.
decrease soil moisture.
improve soil structure.
cause soil compaction.

Question: 3. Benefits of proper mulching include:
reduced soil moisture loss.
minimized weed competition.
improved plant growth and vigor.
all of the above.

Question: 4. Benefits of proper mulching may also include:
increasing soil compaction.
increasing salt buildup.
increasing soil fertility.
all of the above.

Question: 5. A mulch should be chosen that allows:
for the exchange of gases.
for the penetration of water down to the roots.
for the controlled release of nutrients.
for all of the above.

Question: 6. Which statement is true?
A 2 inch layer of wood chips has been shown to improve tree establishment because mycorrhizae are stimulated.
A 5 inch layer of wood chips has been shown to improve tree establishment because mycorrhizae are stimulated.
Mycorrhizae are stimulated by the fast release of carbon and nitrogen in organic matter.
All of the above.

Question: 7. For perpetually wet soils that need as much soil oxygen as possible for root respiration:
use a mulch to control weeds.
use a mulch for proper surface soil aeration and gas exchange.
use a combination of systemic post-emergent and pre-emergent herbicides to control weeds.
all of the above.

Question: 8. Over-mulching continues to be a major problem because:
a visual inspection of the root flare is possible.
buttress roots can be seen.
it stresses many landscape trees and shrubs.
it is a good place to use surplus mulch.

Question: 9. Potential problems associated with poor mulching practices include:
lack of gas exchange.
oxygen starvation of the roots.
promotion of stem and root diseases.
all of the above.

Question: 10. Mulching recommendations include:
using composted mulches.
using fresh mulch.
applying at least 4 inches of mulch on well-drained soils.
incorporating green or non-decomposed mulch into the soil.

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