Grapevines generally grow best in slightly acid soils of pH 6.0 to 6.5, but will tolerate a general range of 5.5 to 7.5, where the soil is not oxygen-deficient.
Grapes can contain a high concentration of tartaric acid, which give them among the highest acid content in fruits. The pH of concord grapes is in the range 2.8 to 3.0, compared to higher than 3.0 for orange juice. Tokyo grapes are among the least acid at a pH above 3.3. See Related Links
E. coli bacteria grow best at a pH of around 7.4 to 7.6.
Bacteria typically grow best at a pH level around 6.5 to 7.5.
pH levels vary among bacterial species. For example; acidophillic bacteria grow best at low pH. While alkalophiles grow better at alkaline (high) pH. Most bacteria grow best at high aw (>0.90). While few bacterial species such as xerophiles grow best at an aw of 0.6-0.7
A pH over 7 is basic.A pH=7 is neutral.A pH under 7 is acid.
A pH over 7 is basic.A pH=7 is neutral.A pH under 7 is acid.
pH levels vary among bacterial species. For example; acidophillic bacteria grow best at low pH. While alkalophiles grow better at alkaline (high) pH. Most bacteria grow best at high aw (>0.90). While few bacterial species such as xerophiles grow best at an aw of 0.6-0.7
Pathogens typically grow best at a neutral pH level, around 7.0 to 7.4.
Farmers use the pH scale to measure the acidity or alkalinity of soil. This information helps them determine the type of crops that will grow best in a particular area and allows them to make adjustments to the soil's pH levels through the addition of lime or sulfur. Maintaining the correct pH level in the soil is crucial for optimal plant growth and nutrient uptake.
the pH scale
the pH
Grapes, Concord2.80 - 3.00Grapes, Seedless2.90 - 3.82