Soil salinisation and freshwater scarcity severely restrict global agricultural sustainability. A laboratory soil column experiment was conducted to ameliorate extremely heavy saline soil using high‐salinity brackish water drip irrigation. The initial soil had a saturated paste extract electrical conductivity (EC e ) of 109.5 dS·m −1 , a sodium adsorption ratio (SAR) of 89.23 (mmol·L −1 ) 0.5 and a pH of 7.70. Five irrigation...