3.2.2
Mulching
3.2.2.1
Hay or Straw Mulch
Hay or straw mulch shall be spread uniformly at the rate of 0.75 metric
tons per hectare 2 tons per acre. Mulch shall be spread by hand,
blower-type mulch spreader, or other approved method. Mulching shall be
started on the windward side of relatively flat areas or on the upper part
of steep slopes, and continued uniformly until the area is covered. The
mulch shall not be bunched or clumped. Sunlight shall not be completely
excluded from penetrating to the ground surface. All areas installed with
seed shall be mulched on the same day as the seeding. Mulch shall be
anchored immediately following spreading.
3.2.2.2
Mechanical Anchor
Mechanical anchor shall be a V-type-wheel land packer; a scalloped-disk
land packer designed to force mulch into the soil surface; or other
suitable equipment.
3.2.2.3
Wood Cellulose Fiber, Paper Fiber and Recycled Paper
Wood cellulose fiber, paper fiber, or recycled paper shall be applied as
part of the hydroseeding operation. The mulch shall be mixed and applied
in accordance with the manufacturer's recommendations.
[3.2.3
Applying Seed Over Sprigs
Seed shall be applied using either [broadcast] [or] [hydroseeding]
equipment and methods. Seeding procedure shall ensure even coverage.
Gravity feed applicators, which drop seed directly from a hopper onto the
prepared soil, shall not be used.
[3.2.3.1
Broadcast Seeding
Seed shall be uniformly broadcast at the rate of [_____] kilograms per
hectare pounds per 1000 square feet using broadcast seeders. Half the
total rate of seed application shall be broadcast in 1 direction, with the
remainder of the seed rate broadcast at 90 degrees from the first
direction. Seed shall be covered to a minimum 6 mm 1/4 inch depth by disk
harrow, steel mat drag, cultipacker, or other approved device. Seed shall
be broadcast and covered prior to sprigging operation.
][3.2.3.2
Hydroseeding
Seed shall be mixed to ensure broadcast at the rate of [_____] kilograms
per hectare pounds per 1000 square feet. Seed and fertilizer shall be
added to water and thoroughly mixed at the rates specified. The maximum
time period for the seed to be held in the slurry shall be 24 hours. [Wood
cellulose fiber mulch and tackifier shall be added at the rates recommended
by the manufacturer after the seed, fertilizer, and water have been
thoroughly mixed to produce a homogeneous slurry.] Slurry shall be
uniformly applied under pressure over the entire area. The hydroseeded
area shall not be rolled.
]]3.2.4
Rolling
The entire area shall be firmed with a roller not exceeding 130 kilograms
per meter 90 pounds per foot roller width. Slopes over a maximum
SECTION 02923
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