I don't think the ocean produces nitrogen or oxygen for that matter. Nitrogen comes from fusion (in a star, hydrogen turns into helium, which in turn changes into heavier elements). The ocean may store some nitrogen as a dissolved gas and nitrogen in the form of compounds such as NH3 and other soluble salts.
Most of the worlds oxygen is produced by Trees.
Russia and China
Russia
OIL!
70 percent
43 percent
The Earth's grass produce 20 to 30 percent oxygen. The other 70 to 80 percent of oxygen is produced by marine plants.
Vietnam produces 14.3 percent of world's total coffee produced. It is second on the list after Brazil that produces almost 80 percent.
Most of the worlds oxygen is produced by Trees.
Asia is home to about 55% of the worlds population.
25.5 percent
wheat
2 percent
India does.....
Forty percent of the worlds population have pets at home.
33%.
2.5%