Now, the natural chemistry that goes on in your soil changes subtly with the seasons as grass clipings decompose, nutrients break down and soil ages. Different kinds of plants need different kinds of soil chemistry to thrive. Soils are classified as acid, neutral or alkaline, depending on their chemical reaction. That reaction determines how much of each nutrient will available to the plant.
Recently we purchased a lot and put a home on it. We are now "in the country" as my husband lovingly refers to it. Left with nothing but dirt after the septic and the well went it, we tried unsuccesfully for over a year to grow grass and nothing I mean NOTHING thrived. We have beautiful Oaks that provide the perfect landscape only these beautiful creatures strip the lime from the soil and without it nothing will grow. After this ephifany we enthusiastically tromped off to Lowes and purchased an inexpensive soil kit so we could test for various nutrients and bought a huge bag of lime determined that we would now have grass. To our suprise lime was NOT missing from our soil. If fact our biggest problem was that we had ZERO as in nada, zip, zilch, none... Nitrogen.
Grass is notorious for needing a lot of nitrogen fertilizer. Nitrogen is a macronutrient that all plants need. An excess of nitrogen, caused by fertilizer over application, can result in rapid, lush growth and a diminished root system. In extreme cases too much quick release nitrogen can cause burning of the leaf tissue, and plant death. A lawn with a nitrogen deficiency will lose it's green color and begin to turn yellow. Too much fertilizer, especially with high levels of soluble nitrogen fertilizer, tends to increase thatch problems and leaves lawns more prone to insect and disease. Or, worse yet, you will literally burn your lawn.
Recommendation: The goal of a good fertility program is to produce a reasonable amount of top growth, but not at the expense of root growth or carbohydrate storage. A good root system is the key factor to a healthy lawn. Moral of the story? Save yourself alot of headache and purchase yourself a good soil test kit before embarking on any fertilization program.