2.3.8.1
Particle Size
Minimum percent by weight passing:
4.75 mmNo. 4 mesh screen
95
2.36 mmNo. 8 mesh screen
80
2.3.8.2
Nitrogen Content
Minimum percent based on dry weight:
Fir Sawdust
0.7
Fir or Pine Bark
1.0
2.3.9
Gypsum
Coarsely ground gypsum comprised of calcium sulfate dihydrate 91 percent,
calcium 22 percent, sulfur 17 percent; minimum 96 percent passing through
850 micrometers 20 mesh screen, 100 percent passing thru 970 micrometers 16
mesh screen.
2.3.10
Calcined Clay
Calcined clay shall be granular particles produced from montmorillonite
clay calcined to a minimum temperature of 650 degrees C. 1200 degrees F.
Gradation: A minimum 90 percent shall pass a 2.36 mm No. 8 sieve; a
minimum 99 percent shall be retained on a 0.250 mm No. 60 sieve; and a
maximum 2 percent shall pass a 0.150 mm No. 100 sieve. Bulk density: A
maximum 640 kilogram per cubic meter 40 pounds per cubic foot.
2.4
FERTILIZER
**************************************************************************
NOTE: Check with the local Agriculture County
Extension Service Office for recommended fertilizer
mixture for local conditions.
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2.4.1
Granular Fertilizer
[Organic][synthetic], granular controlled release fertilizer containing the
following minimum percentages, by weight, of plant food nutrients:
[_____] percent available nitrogen
[_____] percent available phosphorus
[_____] percent available potassium
[_____] percent sulfur
[[_____] percent iron]
2.4.2
Hydroseeding Fertilizer
Controlled release fertilizer, to use with hydroseeding and composed of
pills coated with plastic resin to provide a continuous release of
nutrients for at least 6 months and containing the following minimum
percentages, by weight, of plant food nutrients.
[_____] percent available nitrogen
[_____] percent available phosphorus
[_____] percent available potassium
SECTION 02921
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