Conversation so far:
What does Double wheat season mean?
In the summer he would breed wheat in the central highlands as usual, then immediately take the seeds north to the Yaqui Valley research station near Ciudad Obregon.
What was the ending result?
The difference in altitudes and temperatures would allow more crops to be grown each year.

Question: Did he have any critics for doing this?
Self-contained rewrite: Did Norman Borlaug have any critics for the difference in altitudes and temps?