Abstract
Theoretical treatment of the distribution and seasonal changes in the contents of nitrogen and phosphorus have generally been limited to the case of oceanic water. The similar treatment, however, is difficult in the case of coastal water. The difficulties may probably be due to the facts that the coastal water is rich in or-ganic matter and that a condiderable part of it is in the form of dissolved organic substances.
Some explanations on the seasonal changes in the contents of nutrient salts in Tokyo Bay have been forwarded from the results that the nitrogen phosphorus ratio in such waters was found to be the same as that in oceanic water
