George H. Enfield, 73, a retired agronomist with the Agriculture Department, died Wednesday at his home in Silver Spring after apparently suffering a heart attack.

He had retired in early 1971 but was called back to work during the summer on a corn leaf blight outbreak before his final retirement.

Born in Hamilton, Ind., Mr. Enfield earned degrees in agricultural chemistry and agronomy from Purdue University where he worked under the cooperative extension program until 1953.

He then was an extension agricultural adviser in Iran and later worked with Jordan's ministry of agriculture before joining the Agriculture Department's Extension Service here in 1955 as a soil specialist.

Mr. Enfield was a member of the American Society of Agronomy, the Soil Science Society of America, the Crop Science Society of America, the Soil Conservation Society of America and the International Society of Soil Science.

He was active in the Leisure World Kiwanis Club and the new Interfaith Chapel, now under construction at Leisure World.

He is survived by his wife, Irene, of the home; two sons, Carl, of Ada, Okla., and Jerry, of Richmond; a brother, Hugh, of Decherd, Tenn., and six grandchildren.

The family suggests that expressions of sympathy may be in the form of contributions to the Interfaith Chapel Building Fund, Rossmoor Leisure World.