Yield response factors (Ky) of treatments in the first and the second years were determined as 0.59 and 0.99, respectively ( Fig. 7). This situation indicates that second year might be decrease 0.99 unit yield per one unit of water deficiency. The amount of irrigation water, plant water consumption and Ky values in the second year increased significantly due to higher climate parameters (evaporation, temperature, etc.) in the second year than the first year. Yildirim and Kodal (1998) determined that yield response factor (Ky) for total growing period were found as 0.96.