This episode's headline: Politics of Grain. The guests include Rep. JOHN LeBOUTILLIER, Republican, New York; JAMES WEBSTER, Agriculture Reporter; In Des Moines (Facilities: Iowa Public Broadcasting Network): VAREL BAILEY, Farmer. Byline: In New York: ROBERT MacNEIL, Executive Editor; In Washington: CHARLAYNE HUNTER-GAULT, Correspondent; JOE QUINLAN, Producer; MAURA LERNER, NANCY NICHOLS, Reporters; TOM MASHBERG, Researcher