In chemistry, PH is a measure of the activity of the(solvated) hydrogen ion. p[H], which measures the hydrogen ion
concentration is closely related to, and is often written as, pH. Pure water has a pH very close to 7 at 25°C. Solutions
with a pH less than 7 are said to be acidic and solutions with a pH greater than 7 are basic or alkaline. The pH scale is
traceable to a set of standard solutions whose pH is established by international agreement. Primary pH standard
values are determined using a concentration cell with transference, by measuring the potential difference between
a hydrogen electrode and a standard electrode such as the silver chloride electrode. Measurement of pH for aqueous
solutions can be done with a glass electrode and a pH meter, or using indicators pH is important because it effects the
availability of nutrients in the soil. However, there is another factor that effects nutrient availability much more
,Fulvic Acid. Fulvic acid combines with nutrient ions in the soil making them effectively organic in nature and therefore
much more readily absorbed by the plant.