Abstarct: Abstract This study was aimed to investigate the effects of magnetic irrigation, deficit irrigation, and superabsorbent polymers on the morphophysiological, phytochemical characteristics, and seed yield of cumin in two regions, Rahnjan and Garman, in Shahroud. The experiment was conducted as a factorial split-plot on the basis of a randomized complete block design (RCBD) with three replications. The treatments were irrigation water type (normal and magnetic), irrigation levels (providing 100%, 70%, and 40% of the plant's water requirement), and different amounts of superabsorbent polymer (0, 100, and 200 kg per hectare). The results indicated that anthocyanins had the most significant positive impact on drought tolerance in cumin, and their interactions with other antioxidants contributed to improving plant resistance. Carotenoids played an essential role in enhancing drought tolerance, though their effect was indirect and mediated through the stimulation of other antioxidants. Peroxidase enzyme showed the highest effect in increasing drought tolerance. Deficit irrigation significantly reduced seed yield, grain nutrient concentrations (nitrogen, phosphorus, potassium, iron, manganese, and calcium). However, magnetic irrigation had a positive effect in mitigating the adverse effects of drought stress, leading to improved seed yield and increased grain nutrient contnt. Additionally, the application of superabsorbent polymers enhanced soil moisture retention and reduced the negative impacts of water deficit. Furthermore, using magnetic water improved the chemical properties of water, reducing hardness, sodium, and bicarbonate levels, ultimately enhancing water quality for agricultural use. Overall, magnetic irrigation and the use of superabsorbent polymers, particularly under water-deficient conditions, contributed to the preservation and enhancement of seed yield.