32. Use Yard Waste As Mulch |
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Green waste, such as tree limbs, leaves, and grass, are not a problem
in the forest. Dead organic material is all just part of a larger
nutrient cycle. Homeowners might do well to take the same long view
as Mother Nature by putting yard waste to good use as mulch around
trees, shrubs, and other plantings.
Mulch benefits your landscape by conserving soil moisture; maintaining
uniform soil temperature; minimizing soil erosion and compaction;
reducing weed problems; giving a neater, more finished appearance
to the flowerbed, garden or other planting; and altering the soil
structure to increase root growth.
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Apply mulch about 4 inches deep (no deeper than 6 inches), and keep
it at least 6 inches away from tree trunks. With established plants
in the garden, apply mulch in mid-spring, when the soil has warmed
up sufficiently for active root growth. This will keep the ground
cool and delay root development. |
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With
newly planted material, apply mulch after the plants are set in place
and watered well. If you plant in the late summer or early fall, apply
the mulch immediately after watering the plants so that soil will
be kept warm during the cool nights. Keep organic mulches wet when
applying them to the soil. |
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Organic
mulches have little effect on the nutrient level in the soil and should
not be considered a substitute for fertilizer. In fact, quickly decaying
mulches—fresh leaves, wood chips, and straw—can remove
a considerable amount of nitrogen from the soil. |
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If
organic mulches are kept too wet, then fungi, bacteria, and molds
can develop. Also, insects and rodents can overwinter in some organic
mulches. And although sphagnum peat usually lowers the pH, most other
organic mulches are slightly alkaline (pH above 7.0). |
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Several types of yard waste can make good mulch, with compost rating
as one of the best. Leaves make a better mulch if they are composted,
and grass clippings are best when used dry. If you apply fresh clippings,
spread them loosely; otherwise, they will mat down, produce heat during
composition, and give off an offensive odor. |
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If
you need to dispose of branches and other woody material, one option
is to rent a wood chipper. Wood chips are very durable and make an
excellent material for covering paths and walkways. If used on landscape
beds, periodically apply fertilizer to prevent nitrogen deficiencies. |
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