Plant Field ended in 2002.
Plant Field was created in 1899.
Plant
You cannot answer this without knowing the length of the field as well.
Because opposite charges attract. The negative end of the dipole moment is trying to get to the positive end of the field, and the positive end of the dipole is trying to get to the negative end of the field.
Ebbets Field ended in 1960.
Imeson Field ended in 1968.
Bettis Field ended in 1948.
Field Enterprises ended in 1984.
Marshall Field's ended in 2006.
Dugdale Field ended in 1932.
Crosley Field ended in 1970.
Breadon Field ended in 1960.