C. Substrates are convenient to set
up. They often require no other
containers. They require a little
more care than other systems.- Enough mix is prepared to fill the
containers.
Chapter 12
PH
PH is the measure of acid-alkalinity
balance of a solution. It is measured on a
scale of 1-14 with 1 being most acidic. 7 is
neutral and 14 is most alkaline. Most
nutrients are soluble in a limited range of
acidity from about 6-7. Should the water
become too acid or alkaline, the nutrients
dissolved in the water precipitate and
become unavailable to the plants. When
nutrients are locked up, the plants cannot
grow. Typically, a plant growing in an
environment with a low pH is very small,
often growing only a few inches in several
months. Plants growing in a high pH
environment will look pale and sickly and
also have stunted growth.
PH is measured using aquarium or
garden pH chemical test kits pH paper or a