are microorganisms capable of biological nitrogen fixation, the
process whereby gaseous nitrogen is taken from the air and reduced
to forms usable by algae and available to plants.
The proces is the same
as that which takes place within the nodules of legumes, except
that the blue-green algae are free-living and not dependent on
any particular host plant. Whereas the energy for nitrogen fixation
algae provide their own energy from photosyntheses on the soil
Large cells within the
blue-green algae are called heterocysts, they are the special
factories within which gaseous nitrogen is first converted to
ammonia and then incorporated into organic forms.
Depending on soil condition
and levels of pesticides, the blue-green algae will reproduce
to about the same extent as CHLAMYDOMONAS and provide from 30-200
lbs. of nitrogen per acre per year.
Apply 1 gallon per 10 acres 3-4 times a year.