Liming is an important part of a lawn growing and management program. Particularly in the humid, eastern part of the United States where the rainfall exceeds 30 inches per year. Such conditions can positively give rise to leaching basic or alkaline-forming ions, such as calcium and magnesium, from the soil and resulting in an acid soil condition that restricts growth of the lawn. Studies have revealed that in over 24,000 lawn samples analyzed by the Virginia Tech laboratory in 1987, more than 51 percent tested less than pH 6.0 and the optimum pH level for turf is in the range of 6.2-6.5. However, lime should not be applied unless a soil test indicates that it's needed. Too much lime can be as harmful as too little, causing potential trace element deficiencies.
How to apply:
Limestone is very simple to apply. Either a drop spreader or a spinner spreader can be used effectively. The most important thing to keep in mind is the uniform coverage as lime is very insoluble and essentially stays where it is put. Also those areas that are skipped areas won't receive the lime needed to neutralize acidity and the overlapped areas, where double the recommended amount is applied, will have too high a pH level with the potential for trace element problems. However to ensure an even coverage, one half of the lime should be applied in one direction, and the remainder applied in a perpendicular or preferably in a crisscross pattern. If one is using ground lime, it is simple to determine if coverage is uniform because of the visible white color of the material and more care should be taken if palletized lime is used. In case if the recommendation calls for more than 50 lbs./1000 sq. ft. to established turf, the lime application should be split. If the requirement for aesthetic reasons and additional applications rises, lime should be applied three to six months after the first application. On an average, it is observed that applications of less than 50 lbs./1000 sq. ft. will disappear from the surface after one or two rains, while the larger amounts will remain visible for a longer period of time.

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