Polarization controlling elements equivalent to quarter and half waveplates are constructed from sequences of variable retarder plates having fixed retardation axes. A second insulating substrate faces the first insulating substrate. Methods for producing a maize plant that comprises crossing hybrid maize variety X03A112 with another maize plant. A thin film with a favorable film quality can be formed by a wet process using the composition. The foam control agents are of the formula I:wherein R1, R2, R3, R4, n and y are as defined herein. The second side wall portion is connected to the second surface and includes a non-scalloped surface.