Question for Feb 10, 2010

X was an American agronomist, also known as the father of the green revolution. He is widely credited with saving over a billion people worldwide from starvation. X first came into prominence due to his work on wheat research in Mexico. Using new breeding techniques, he helped Mexico, India and Pakistan dramatically improve their wheat yields and become self-sufficient in wheat production. For his efforts, X was awarded the Nobel peace prize in 1970, the Padma Vibhushan in 2006 and the Congressional Gold Medal in 2007. His death in September 2009 led to tributes from all over the world for his work on increasing food production worldwide. Identify X.