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  <br />City of Sunny Isles Beach | Invitation to Bid No. 17‐05‐01  55    <br />  <br />fertilizer with 67% Ronstar manufactured by Harrell’s. The granular fertilizer shall have an <br />analysis N-P-K ratio of 1-0-1 applied every 90 days (4 times per year). Products should be <br />applied at the rate of 2 pounds of actual nitrogen with 2 pounds of Ronstar per 1,000 <br />square feet of lawn area. Granular applications may be adjusted based on soil tests. The <br />Contractor is responsible for contracting with a laboratory approved by the City, to <br />complete two soil analyses per year to verify the minor element requirements, and adjust <br />fertilizer application as needed. The Contractor will submit soil analysis to City for review. <br />Micronutrients and supplemental macronutrients to be determined by soil and tissue tests. <br />All micronutrients and supplemental macronutrients should be applied as a liquid form for <br />foliar uptake. Contractor is responsible to follow manufacturer’s recommendations for <br />fertilization rates and amount. <br /> <br />3.14.4 AERATION, VERTICUTTING, SLICING <br />Shallow tine slice aeration shall be performed at least every other month (six times per <br />year) to provide proper air and water exchange for maximum growth potential and health <br />of Bermuda turf. Aeration shall result in a hole depth of 3-4 inches with average spacing <br />of 16 holes per square foot. Deep tine aeration, minimum 8” deep, shall be performed <br />twice per year. In areas with noticeable compaction and wear, additional aeration will be <br />required at no additional cost. Coordinate dates for this work with the City. Contractor is <br />to check the depth of any wires, irrigation or utilities prior to application. <br /> <br />Verticutting must be performed once a year and thatch build-up needs to be monitored <br />and alleviated when necessary. De-thatching should be maintained at a depth of ¼” – ½” <br />of depth and thatch shall be collected and disposed of by the Contractor. <br /> <br />3.14.5 WEED CONTROL <br />For weed control, on Bermuda turf, the Contractor shall apply Sencor 75 Turf herbicide <br />and Revolver Selective herbicide by Bayer or approved equal to maintain a 95% weed free <br />turf, following the manufacturer’s instructions for application methods and amounts. Visible <br />weeds shall be removed by hand before the base reaches more than one inch in diameter. <br /> <br />3.15 EDGING <br /> <br />Sidewalks, driveways, curbs, and other concrete or asphalt edges must be edged concurrently (same <br />day) with each mowing cycle. Edging height must match surrounding area turf heights and must be <br />neat and clean, providing a clear zone free of scalping, rutting, bruising, uneven or rough cutting. <br />All sidewalks, driveways, street edges, curbs, and other paved areas must be edged to maintain a <br />clear zone immediately adjacent to paved surfaces and to provide uniform edge lines. In addition, <br />the following edging standards have been established: <br /> <br /> Edging must be performed at the same time as mowing and must be cut to the same height <br />standards established for turf mowing heights. <br /> Contractor must maintain the shape of planting beds when edging. <br /> No vegetation or debris may encroach onto the curb or sidewalk.