What effect does limestone has on the pH of soil?

Their composition depends on such factors as whether they are composed primarily of sand, clay or loam, on how much of the three main plant nutrients -- nitrogen, phosphorous and potassium -- they contain, and on whether their soil is acid or alkaline. Lime is used to affect this last factor by raising soil pH. read more

Furthermore just what is pH of a soil. It is the relative measure of the hydrogen ion concentration expressed as miliequivelents per 100 grams of soil. The liming reaction reduces the hydrogen ion concentration, thus the pH goes up. read more

Soil pH. Soil pH is the measurement of how acidic or alkaline your soil is. pH stands for potential of H+ ions in a solution and is a way to measure the available hydrogen ions; the more hydrogen ions, the more acidic. The more hydroxyl (OH-) ions, the more alkaline. A neutral pH is 7.0, while higher is more alkaline and lower more acidic. read more

a soil test indicates a pH below 6.5, the usual recommendation is for the application of ground limestone. In addition to having the ability to raise pH, limestone contains calcium. read more