The pH scale is used to measure the concentration of hydrogen ions and the acidic and alkaline content in a liquid. The abbreviation pH stands for percentage of hydronium ion. The pH scale starts from 0 which indicates the most acidic, to 14 the most alkaline and 7 the most neutral. Water is the only neutral liquid, but most other liquids are nearly neutral, slightly above or below a 7 on the scale. There are several soil factors that influence plant growth, including; “Soil bacteria, nutrient leaching, nutrient availability, toxic elements, and soil structure” (http://pss.uvm.edu/ppp/pubs/oh34.htm). Most plants prefer their soil to be slightly acidic, with a range of 5.5-7.0. Like most legumes, pisum sativum var. macrocarpons, also known as snow peas, prefer a soil pH range of 6.0 to 7.0. If the soil pH is slightly below neutral around 6.0, the No. pea plant will grow. 2 will grow faster than the others because pea plants grow best in soil that is slightly acidic. (Materials and Methods) Five Solo plastic cups were arranged with uniform amounts of soil. On each piece of plastic were written the numbers from 1 to 5...