Agriculture PRODUCES more CO2???

What is missing from the paper, as well as from known science, is where all the missing CO2 is going.

Would it have been more clear to you if the quote had been ever so slightly changed:

“They found that production of these crops in the Northern Hemisphere has more than doubled since 1961 and translates to about a billion metric tons of carbon captured by the growth of plants and released by their subsequent decomposition each year.”

Yes.

And when the sun isn’t shining. They convert that sugar right back to carbon dioxide as they respire.