Effect of high residual sodium carbonat (RSC) water and amendments on soil properties under rice-mustard (Brassica juncea ‘Khanpur Raya’) rotationSilvestre, Wendel Paulo (Avtor) Ahmed, Khalil (Avtor) Nawaz, Muhammad Faisal (Avtor) Qadir, Ghulam (Avtor) Rizwan, Muhammad (Avtor) Nawaz, Muhammad Qaisar (Avtor) residual sodium carbonatericemustardsalinitysodic watergypsumsulfuric acidguarA trial was designed to study the deleterious ef-fect of high RSC water on soil properties under rice-mustard crop rotation. Treatments included were; T1: high RSC water, T2: gypsum on the basis of RSC of water, T3: H2SO4 on the basis of RSC of water, T4: green manuring with guar, T5: farm yard manure (FYM) at the rate of 10 t. ha-1. For irrigation tube well water having (electrical conductivity (EC) 1.37 dS m-1, sodium adsorption ratio (SAR) 8.40 (mmol l-1)1/2 and RSC 7.85 me l-1) was used. The results revealed that lowest paddy (2.22 t ha−1) and grain yield (1.00 t ha−1) of rice and mustard were recorded when irrigated with high RSC water. In case of soil analysis, long-term use of high RSC water induces secondary salinity by increasing pH (1.92 %), EC (5.73 %) and SAR (35.71 %) over their initial values. Harmful effects of high RSC water were thwarted by all the treatments; however, positive effects of gyp-sum were more visible that increased crop growth and grain yield of rice-mustard crops by promoting soil properties. Gyp-sum recorded the highest paddy and grain yield (3.66 t ha−1, 1.70 t ha−1) of rice and mustard crop and decreased soil pHs(4.98 %), ECe (29.93 %) and SAR (54.54 %) over their initial values.20252025-07-15 15:23:51Članek v reviji170766UDK: 633ISSN pri članku: 1854-1941DOI: 10.14720/aas.2025.121.2.18513COBISS_ID: 242637059sl