hydrated lime, hardwood ashes(woodburner coals) cottonseed meal
Germinize your seed first, then plant in soil with a pH of 7.0.
seven
Yes, using a pH-meter and a special designed combined electrode.
The pH level of different plants can be sometimes found in a pH tester. I have a chart that has probably a hundred different plants with all different suggested pH's. You can go to any search engine and type in "What is the suggest pH for [plant so and so]" and you'll find all you need about the plant's suggested pH. I hope this helped.
what is the PH in a plant
pH is important aspect of soil fertility because the level of pH will will influence what kind of organisms that will live in the soil. These can affect how the plants grow since each plant has an optimum pH level in which it will flourish.
IME The best PH water levels for "indoor soil grown" strains is 6.0. Maintaining slightly acidic waterings will save most strains from a host of other problems. Hydroponically grown plants will require lower PH levels 5.5ish. That said... there are some strains that do fall outside of these ranges for optimal growth.
When I did an expiriment I got 12 though it could be lower
Not that I can find
A gardener may wish to use a digital pH meter so that he or she can check the pH level of the soil. If the pH level of the soil is too high or too low it can effect the nutrients a plant is able to use. A good pH level for most plants is between 5.5 and 7.0.
Farmers need to test the pH level in the soil because, as you should know, both acidic and alkaline soil damage the crops a lot and ruin the hopes of a farmer. You say,"Why?" Acids and alkalis are corrosive and will eat into the plant's roots. Neutral soil alone can support plant growth.... while the answer above is mostly correct the main reason to test pH levels is its effect on nutrients availability. for example at a pH level of 5.5 iron is 100 times more available to plants then at pH 6.5 but at pH 4.5 aluminum starts to be absorbed by the plant and it is poisoness to it. most plants can grow in soil from pH 5.5 to 8.0 but each has its favorate level
Apples have a pH level of 3. Also, soda has a pH level of 4, and vinegar's pH level is 2.5.