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Ensure that the wildflower seed is uniformly planted by drilling or placing the seed into the soil at an average depth of 1/8 inch, but not exceeding 1 /4 inch into the designated area at the specified rate. 570-3.4 Mulching: When areas require mulch, as shown on the plans, apply approximately 2 inches, loose thickness, of the mulch material uniformly over the seeded area, and cut the mulch material into the soil to produce a loose mulched thickness of 3 to 4 inches. Do n,. not use harrows. The Contractor may use compost meeting the requirements of Section 987 in lieu of mulch. When mulching on steep slopes, where the use of a machine for the cutting-in + process is not practicable, secure the mulch after the seeding operation by either using an erosion control fabric, or; spread a string net over the mulch using stakes driven flush with the top of the mulch at 6 foot centers and string parallel and perpendicular with diagonals in both directions. 570-3.5 Rolling: Immediately after seeding, roll the entire grassed or mulched area with a cultipacker, traffic roller or a horticultural roller. Make at least two passes over the entire area. 570-3.6 Watering: Provide a vehicle for applying water to the grassed areas equipped +� with either a calibrated tank or an approved metering device installed at such point on the vehicle to measure the water at time of application. Do not water newly seeded areas to force the seed germination. Do not apply more than 1 inch of water per week for sustaining the grass growth. Use water only on vegetated areas when permitted by the Engineer. 570-3.7 Fertilizing: Spread the fertilizer over the grassed area four to five weeks after the grass seed germinates in one or more applications as specified below: • Spread an initial application of 265 lbs/acre of 16-4- 8 . If the project has not reached final acceptance in accordance with Article 5- 11 , spread subsequent applications of 135 lbs/acre of 16-4-8 approximately 60 calendar days after the initial application without mixing into the soil. The Contractor may spread the fertilizer by hand on steep slopes or other areas where machine-spreading may not be practicable . r 570-4 Maintenance. Maintain the planted areas as an acceptable stand of grass until final acceptance of the project at no expense to the Department. Include in such maintenance the filling, leveling, and repairing of any washed or eroded areas, as may be necessary . An acceptable stand of grass is defined as a 1 by 1 foot area containing a minimum of 16 live, viable, healthy wildflower and/or grass seedlings. The Department will pay for replanting as necessary due to factors determined to he beyond control of the Contractor. Mow the planted grass areas to a height of 6 inches when competing vegetation height exceeds 20 inches in height. Do not mow wildflower areas until at least three weeks after the peak of the bloom period and do not mow lower than 6 inches. Do not use selective herbicides in wildflower areas. 570-5 Method of Measurement. 570-5.1 General: The quantities to be paid for will be for the following items, completed and accepted: ( 1 ) The area, in square feet, of seeding. (2) The area, in square feet, of seeding and mulching. (3) The weight, in pounds, of grass seed. M.