Compositions and methods for producing a crop having a predetermined level of at least one primary trait of interest are provided. The compositions comprise seeds and plants exhibiting a primary trait of interest. Primary traits include traits that improve or otherwise facilitate the conversion of harvested plant material into a commercially useful product. The predetermined level of the primary trait is obtained by blending harvested plant material from at least two varieties of plants, wherein at least one of the varieties exhibits the primary trait. The blend can be customized for use in a variety of commercially important industrial or agricultural downstream uses.