the effect of ph of water on plant growth

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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 percent hydronium ion. The pH scale starts from 0 being the most acidic, to 14 being the most alkaline, and 7 being neutral. Water is the only liquid that is neutral, but most other liquids are near neutral, ranging just slightly above or below 7 on the scale.
There are several soil factors that affect 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 soil to be slightly acidic, ranging from 5.5-7.0. As like most legumes, pisum sativum var. macrocarpon, also known as snow peas, prefer a soil pH range of 6.0-7.0.
If the pH of the soil is slightly below neutral around 6.0, then the pea plant #2 will grow faster than the others because pea plants grow better in soil that is slightly acidic.
(Materials and methods) Five plastic Solo cups were arranged with even amounts of soil. Numbers 1-5 were written on each plastic...

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