Soil Doctor wrote:
Nitrogen ; Phosphorus; Potassium are mineral salts (Cations /
Anions) they are required by a plant for growth. They are not
vitamins, or organic. They do feed the plant so that proteins
can
be produced by the action of photosynthesis, etc.
there are soem 92 natural elements in the universe that all
effect
plant growth and development.
Before apply any 'Fertilisers' you need to know what is already
in
ther soil and its relationship with soil microbial, fungi,
fauna
life and so on.

Feeding a plant with Nitrate nitrogen may be required if
applied in
excess it will produce a weak straggly plant prone to disease
and
pest. nitrates are also carcinogens.

Please mail me / reply for more information and better soil
health.
Remember a plant will response to how we treat the soil. If we
eat
the produce from the plant then we too respond from the quality
of
the plant.
Ever wondered why there are so many sick people around?? You
are
what you eat. The plant is also what it eats (utilises)
Mark Atkins
Agronomist

I guess you didn't do too well in English 101.

--

Travis in Shoreline (just North of Seattle) Washington
USDA Zone 8
Sunset Zone 5