A pH scale is a way to rate how acidic or alkaline soil is. It ranges from 0 to 14. Seven is considered neutral. Above seven is alkaline and below seven is acidic. The pH increases or decreases by 10 times for each point on the scale.
The pH scale ranges from 0 (battery acid) to 14 (basic; liquid drain cleaner is an example). A pH of 7.0 is neutral, and most tap water ranges from pH 6.5 to 8.0.
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Using a pH Scale in Gardening
... often. Learn about the influence of pH levels on gardening from an award-winning horticulturist.
Although the pH scale only has a 0 to 14 range, it is a logarithmic scale that is designed to measure vast differences. Think of the Ritcher Scale of earthquake magnitude as another example of a logarithmic scale.
What the pH scale actually measures is the hydrogen ion (H+) concentration present. pH values run from 0 (the most acidic value possible) to 14 (the most alkaline value possible).
The most important thing you need to know is your soil's level of acidity or alkalinity, which is called its pH value, and the value is measured on a pH scale that runs from 0 to 14, with 7.0 representing neutral soil.
On the pH scale they register on the acid side. Some such as oak leaves are more acidic than others.
The middle of the range on the soil pH scale is the best range for bacterial growth in the soils that promote decomposition.
Most healthy gardens have soil on a pH scale of 6.5 to 7. This garden may look like any other, ...
The pH scale describes the degree of acidity or alkalinity of the soil. An extremely high (alkaline) or low (acid) pH affects the ability of a plant to absorb essential mineral nutrients from the soil.
pH 'The pH scale is a means of expressing the degree of acidity or alkalinity. pH values less than 7 are acid and the lower the figure, the greater the acidity. Values greater than 7 indicate increasing alkalinity and pH 7 is neutral.
pH: Indicates the acidity or alkalinity of the soil. The pH scale reads from 0 to 14, 0 indicates extreme acidic soil and 14 extreme alkaline soil. A pH of 7 is neutral.
pH tester - electronic instrument or chemical used to find where soil or water is on the pH scale.
Phosphor coating -internal bulb coating that diffuses light and is responsible for various color outputs.
pH Level
Correct soil pH allows the root system to absorb crucial nutrients
The pH scale runs from 0 to 14.
Don't worry if you can't recall the definition of logarithm; all you need to know is that each unit on the pH scale represents a tenfold difference in acidity or alkalinity. For example, if lemons have a pH of 2.0 and oranges have a pH of 4.
 See also: Soil, Plant, Alkaline, Neutral, Level
  
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