The wheat plant was previously cultivated on a salty soil treated with biochar and/or sprayed with K, either in its regular form or the nano one, with nanoparticles of Si and organic fertilizer dominated by amino acids in this experiment. Soil samples collected after harvesting wheat were utilized in this experiment to examine the effects of the aforementioned treatments on its qualities. Although biochar improved the soil pH, it had a substantial impact on lowering the soil salinity indicated as electrical conductivity, according to the results (EC in dSm^-1). However, the use of biochar might raise the soil organic matter (SOM) and, as a result, the cation exchange capacity of the soil (CEC). Adding to this, it seems that biochar may have increased the amount of N, P, and K that was accessible. This impact was amplified when biochar was administered together with the K. The application of K considerably lowered soil pH. The pH of the soil was significantly lowered by using K nanoparticles. K fertilizer, particularly when given in its nano-form, may help to reduce soil salinity a little. When K was combined with charcoal or nanoparticles, this impact was amplified. Although it increased the SOM, it also contributed to raising N, P, and K concentrations in the soil. In addition to N, P, and K, the nanoparticles put to the soil improved the CEC and increased the OM content.