This is a chart I made using CGIAR data, which shows the improvement in yield for a variety of crops using so-called “modern seeds” (sometimes called “improved seeds”). These are non-GMO seed varieties cultivated by agronomists using traditional breeding techniques, but in a highly-controlled environment. I created this chart as part of my thesis on agriculture in Tanzania.
James McCammon 
Dear James,
I enjoeyed reading this article. Is it possible to get access to your thesis? I would be interested in reading it. I am involved in research on Tanzanian staple food.
Best wishes, Andreas
Hey Andreas,
The final copy is here. Still many improvements I could make, but ran out of time. https://www.dropbox.com/s/ffdk3no3hcqchhd/Modern%20Seed%20Distribution%20in%20Tanzania.pdf?dl=0
Thanks, James!
You did a great job! 🙂