«The mechanism is believed to have originated in order to ensure the survival of plants located at sites
with nitrogen deficiency,» said Dr. Gitto Kuruthukulangarakoola, first author of the study who is also a researcher at BIOP.
In addition to added compost, I've been supplementing
with wood - ash for three years now, and have just noticed some signs of
nitrogen deficiency; so, «pee» trials may be undertaken in 2010.