519 ALASKA 2020 SECTION 725
725-2.01 DESCRIPTION . Standard commercial fertilizer supplied separately or in mix tures, and
furnished in moisture proof containers. Mark each container with the weight and with the manufacturer's guaranteed analysis of the contents showing the percentage for each ingredient contained therein.
725-2.02 MATERIALS. Furnish a mixture of chemical ingredients providing the total available
nitrogen, phosphoric acid, and potassium required by the soil analysis or as specified in the Special Provisions. Tolerances of the chemical ingredients are plus or minus 2 percent. No Cyanamid compounds or hydrated lime are permitted in mixed fertilizers. 520 ALASKA 2020 SECTION 726 TOPSOIL
726-2.01 TOPSOIL. Furnish a natural friable surface soil without admixtures of undesirable
subsoil, refuse, or foreign materials. Meet the following:
1.Reasonably free of litter and free from roots, clods, hard clay, prohibited noxious weeds, tall grass, brush, sticks, stubble, and be free- draining and non- toxic. Prohibited and Restricted Noxious Weeds are listed in 11AAC 34.020 is located at the following URL: http://plants.alaska.gov/invasives/noxious -weeds.htm .
2.Contain between 3 percent and 20 percent organic matter as determined by loss -on-ignition of oven dried samples according to ATM 203.
3.Grading requirements: Notify the Engineer of the source of topsoil at least 30 days prior to delivery of topsoil to the project from that location. The Engineer will inspect and test the topsoil and its source before approval will be granted for its use. Unsuitable topsoil sources may be used if, prior to delivery to the project, sufficient organic matter in the form of pulverized peat moss or rich organic soil from other sources is thoroughly mixed with the topsoil to provide a product meeting the above requirements. Use the application rates, determined by the Engineer, of fertilizer and limestone per acre of ground area of topsoil, based on soil analysis tests so that the total natural and applied c hemical constituents are as follows: Nitrogen 45 - 65 pounds per acre Phosphoric Acid 45 - 90 pounds per acre Potassium 45 - 90 pounds per acre TABLE 726 -1 LIMESTONE REQUIREMEN TS Soil pH Limestone, tons/acre Above 6.0 0 5.0-6.0 1.5 Below 5.0 3.0 Sieve Percent Passing 2 in. 100 No. 4 75-100 No. 10 60-100 No. 200 10-70
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Source: Alaska Standard Specifications for Highway Construction, 2020 Edition. Pages 547–547 of 584. View official source ↗