DDT stands for dichlorodiphenyltrichloroethane. It is an insecticide that was widely used in agricultural practices. However, due to its harmful effects on the environment and human health, it was banned for agricultural use in 1972.
Note: The provided meaning of the answer is for the latest New York Times crossword puzzle clue: Substance banned for agricultural use in 1972, for short. Explanations are generated by AI and may be inaccurate.