This study examined the effect of deficit irrigation on soil properties, physiology, and nutrient assimilation of sweet peppers. Three irrigation treatments were used: T1 (100% crop water requirement), T2 (90% CWR), and T3 (80% CWR). The results showed that higher irrigation amounts (T1) produced lower bulk density and higher porosity compared to the deficit treatments. Dry matter accumulation and harvest index decreased with greater water deficits. Nitrogen, phosphorus, and potassium uptake by the peppers also decreased as the irrigation amounts decreased. While deficit irrigation affected soil physical properties, the effects were not significant. However, available soil moisture had a strong influence on nutrient uptake by the crops.