1. A computer-implemented method comprising: (A) identifying spatial yield data descriptive of crop yields associated with a plurality of spatial locations in a field; (B) identifying at least one of the following data: (1) experimental design data descriptive of at least one product, system, or rate associated with the plurality of locations in the field; (2) noise data descriptive of noise variables associated with the plurality of locations in the field; and (C) deriving, from the data identified in (B), a measure of the crop yield response in the field to the data identified in (B); wherein the measure of the impact on crop yield comprises a measure of: the impact of the data identified in (B) on crop yield in a first area of the field relative to the impact of the data identified in (B) on crop yield in a second area of the field.