Green Revolution in India was a period when agriculture in India increased its yields due to improved agronomic technology. It allowed developing countries, like India, to overcome chronic food defects. The "revolution" began in the 1960s, but it's confirmed that it began in 1953 (actually in 1950 with men like McIlroy,Kaven, AKSmith Jr. in Uttar Pradesh) through the introduction of high-yield crop varieties and application of modern agricultural techniques. It led to an increase in food production in India, especially in Punjab, Haryana and Uttar Pradesh during the early phase. The main development was higher-yielding varieties of wheat, which were developed by many scientists, including American agronomist Dr. Norman Borlaug, Indian geneticist M. S. Swaminathan, and others. The Indian Agricultural Research Institute also claims credit for enabling the Green Revolution, in part by developing rust resistant strains of wheat.