Despite increased agricultural production by developed countries about 100 years ago, less developed countries continued to use traditional agricultural practices. then, in the 1960s, the research of dr. norman borlaug increased crop production by nearly 500% in mexico and india by using

High yielding varieties of wheat.

Explanation:

The father of the Green revolution as often called, Dr. Norman Borlaug was an American Scientist who was awarded Noble prize for his research. He invented high yielding varieties of wheat which combined with modern agriculture techniques which are used extensively in Mexico and India. It not only solved the problem of food security at home but made these nations wheat exporters.