Abstract
To find out the effect of fertilizer levels and of plants distribution on safflower yield, an experiment was conducted in Iraq - Al-Diwaniyah Governorate in the growing season 2020/2021, The experiment included three replicates with 60 experimental units, and it included combinations levels of fertilization(F1F2, F3 and F4) which represented the following fertilizer levels(N0, P0, K0) (N140, P80, K40) (N160, P100, K60) (N180, P120, K80)Kg.h−1, in addition to five planting distribution (D1, D2, D3, D4 and D5) follows (30 × 30, 40 × 40, 50 × 50, 60 × 60 and 70 × 70 cm). The results showed that the fertilization level(N180, P120, K80) it gave the highest mean of seed weight and head diameter, which amounted to(23.12 g and 2.88cm) respectively. As for the plant distribution D5, Gave the highest of weight of the yield of petals, Head diameter and plant heads number reached to (2.23 g, 2.93 cm, 83.14 head. plant−1) respectively. While the superiority of the treatment D4 was in In seeds number per head 44.88 seed. head−1. Therefore, plants distribution between plants can be reduced with increased fertilization from NPK in the area.