Aeration. A technique by which air is introduced into a liquid; bubbles and aero are generated and dissolved gases released. For example, water aerated by passing through a showerhead will release dissolved radon gas. ACTIVATED CARBON: A material made from burnt wood, which is used to remove organic solutes, such as pesticides, and some inorganic solutes, such as chlorine, from water. Dissolved organic solutes are removed from the water by absorption onto activated carbon. The activated carbon must be periodically replaced when it becomes saturated and unable to adsorb any more solute. Activated carbon is not effective in removing heavy metals, such as lead.
Aeration. Contractor shall aerate once per year or as determined by work order, typically in Spring.
Aeration a. All turf areas shall be aerated once per year between October 1st and October 31st immediately prior to the scheduled fertilization in October.
b. Aeration shall consist of removal of 1 inch diameter cores, 4 inches deep, spaced 12 inches on center.
c. All cores shall be removed from the turf areas, all walkways, roadways or other areas dirtied by aeration operations shall be cleaned and all debris removed an disposed of offsite prior to completion of each day‟s operations.
Aeration. To be undertaken with Ventidrain, Xxxxxx Aerator or similar. When soil is neither too wet or too dry. Initial marking out with Finale herbicide and lining material then fortnightly lining only. Prior to seeding, restore goal and central areas with a xxxxx loam and seed over.
Aeration. 1. All irrigated areas will core aerated one (1) time in the Spring.
Aeration. 15.1 Perform aerating each contract year of warm and cool season grasses in a manner that promotes proper health, growth, color and appearance of cultivated vegetation by using mechanical (deep tine) airifier
Aeration. 2.2.3.1 As needed to maintain standard.
Aeration. Aeration by mechanical means shall be included as a part of the overall turf management. Coring, grooving, slicing, forking, and/or spiking methods shall be used as appropriate for the various turf conditions within the District. This shall occur at least twice per season on all grassed fields The accumulation of thatch shall not be allowed to accumulate to levels more than one-half inch to three-quarters inch in turf grass areas within the District. Acceptable mechanical methods to control thatch levels include vertical mowing, coring, and grooving. Thatch removed and lifted to the surface must then be removed. This shall occur once per season on all grassed fields. Fields shall be top dressed with topsoil of .25 to 2 inches. Dragging of the top-dressed material shall be performed to level the playing surface and fill divots. Seed shall be applied during the early spring season at rates of 10 pounds per 1,000 square feet. All holes and other depressions shall be filled with topsoil, compacted and seeded per this specification. This shall occur at least once per season for all grassed fields. Weed and Feed shall be applied in the third week in May and again, the third week of September. Fertilizer analysis for nitrogen-phosphorous-potassium shall be between 20-2-5 and 25-5-15. Nitrogen shall be provided in the form of coated urea to ensure a minimum of 70% slow release nitrogen. Herbicide applied to football fields and athletic fields shall be Super Trimec, or equal, applied at a rate of no less than three fluid ounces per 1000 square feet. Written DPSCD approval is necessary prior to any /all herbicide applications. Application of the above specified weed and feed shall be limited to after school hours and weekends. All baseball, and softball fields shall be raked and dragged by mechanical means to remove all vegetation from infield mix areas other areas are to be aggregate, or other non-vegetative material. This shall also be performed to properly grade the fields for use. This shall occur at least once per season. Additionally, fields shall be mechanically rolled at least twice per season. Post season restoration efforts are unique to the needs of each field. At the end of each season fields shall be evaluated by the contractor and DPSCD together to determine what steps will be necessary to recondition and assure that all fields will be playable the following season. As referenced above, fields shall be aerated, over-seeded, and fertilized. Sufficient q...
Aeration. Aeration is necessary for thermo-phallic aerobic composting in order to obtain the rapid decomposition, fast decomposition that is characteristic of the process and also is useful in reducing high initial moisture content in composting materials. Several different aeration techniques have been utilized with varying degrees of success. Turning the material is the most common method of aeration when composting is done in stacks. Hand turning of the compost in piles or pits is most commonly used for small villages and farms. Mechanical turning is most economical in large municipal installations. The most important consideration in turning compost apart from aeration is to ensure that the material on the outside of the pile is turned into the centre, when it will be subjected to high temperature. In hand turning with forks, this can be readily accomplished e.g. piles or windrows on top of the ground are simply reconstructed with the materials from the outer layers placed on the inside of the new piles. In case of composting in pits, or trenches, the material can be moved from one pit to another for aeration or if a little space is left at the end of the pit at the initial filling, the material can be turned within the pit. The loss of volume of the material during the stabilization period will facilitate turning within the pit. Mechanical equipment for turning windrows in large composting operation has been developed extensively as a result of the increased interest in composting as a method of refuse disposal. The important criterion for the high degree of aeration is for the avoidance of anaerobic conditions, maintenance of high temperature and the control of flies.
Aeration. Aeration must be performed annually in 1 of the following months: April, May, September or October. Plugs from the aeration should remain on the lawn to break down into the soil Over seeding must be performed annually in 1 of the following months; April, May, September or October according to the detailed over seeding instructions below: Spread topsoil over lawn area to a depth of 1 inch and rake into the lawn. Broadcast a seed mixture high in fescue and low in Kentucky Blue grass seed content (20 % or less) using standard seed spreading equipment. Water lightly (less than 10 minutes per area) for 10 days until seeds germinate. If aerating in the same season as over seeding, aerate first and over seed 2 to 3 weeks later.
