Delta formation round Jeopardy! Show_number 2928 category GENERAL KNOWLEDGE air_date 2002-11-11 question 'This Tuskegee scientist increased yields by alternating the planting of cotton planters' value $600 answer Walt Whitman round Double Jeopardy! Show_number 3902 category WHAT'S MISSING? Air_date 2008-07-07 question 'The part.