Consider an experiment to compare the effectiveness of two different pesti- cides, A and B, both applied in two different forms: spray (A1 and Bi) and powder (A2 and B2). A control treatment (i.e., no pesticide), C, is also included in the experi- ment for comparison purposes. Thus, altogether there are 5 treatments ( A1, A2, B1, B2 and C) and each treatment is randomly applied to n uniformly infested plots of land Obtain a complete set of meaningful orthogonal contrasts and describe what each contrast is testing