1. Chlorosis - This
symptom results when the plant is unable to produce
or maintain an adequate level of the green pigment,
chlorophyll. Instead, the underlying color of the
plant tissue, yellow, will begin to dominate.
Although several
factors may cause a plant to become chlorotic, one
of the key reasons is that the plant lacks nutrients
necessary to build chlorophyll molecules. Key to
this is
nitrogen (N) but other nutrients such as
magnesium (Mg) are also important to chlorophyll
production.
2.
Poor Growth Rate - If
the proper level and types of nutrients are not
available to a plant, if will not grow at the rate
expected.
3.
Necrosis - This is the
death of the tissue which results in it turning
brown. Generally, this is more of a problem with an
excessive amount of nutrients i.e. toxicity.
4.
Lack of New Growth - At
times, a nutrient deficiency will allow the plant to
look normal but there will be no new growth.
