Impact of Bio and Organic Adamants and Per-sowing Seeds Magnetic Field Together with Mineral Nitrogen Fertilizer on Some Soil Physical and Chemical Properties and Faba Bean Productivity under Saline Soil Conditions

Two filed experiments were conducted at Sahl- El-Hussinia , agricultural research station, El-Sharkia Governorate, Egypt, 31o - 8' – 12.461" N and  31o  - 52' – 15.469 E. during two successive winter seasons 2020/2021 and 2021/ 2022 , for studying the effective  of used bio-fertilizer (Rhizobium radiobacter Sp.strain (Salt Tolerant PGPR),humate potassium and pre-sowing seeds faba bean magnetic field different times (5, 10 and 15 min) combined with mineral N fertilizer at rates (15, 30 and 45 N kg/fed) on  some soil chemical and physical properties and faba bean quality and productivity . The studied treatments were arranged within the experimental units in a split split plot design in three replicates. Results indicated that the all treatments had improved soil properties decreased soil salinity and soil pH soil and EC values decreased related to different treatments using foliar application reporting EC decreased value from (11.88 to 11.28) dS/m, pH soil decreased slightly this maybe inverted to the activity of microorganisms .were achieved increased OM% from (0.57 to 0.54)  related to  application of bio fertilizer and humates as compared mineral fertilizer and control,CEC from ( 43.92 to 41.84) Mol/kg, respectively application. the superior impact was increased the soil total porosity values compared to other treatments and control, moreover, the Data obtained that the values of drainable pores (DP) and water holding pores (WHP) were higher than the other pores in different treatments. The results also found that the effect of physical properties on magnetic field strength (MFS) has a marked influence on the magnetization effect, the optimal magnetizing condition was the magnetic field was maximized in a time of 15 minutes. The data explained that the application of all amendments decreased soil HC (cm h-1) values when compared to the control. The improvement perwise the pronounced decrease in hydraulic conductivity of the studied soil may be attributed to the creation of QDP point, and the dominance of SDP point and QDP point compared with other pore sizes and the value of bulk density is decreased by adding the application of all amendments as Bio-fertilizer and humate potassium as compare with all treatments and control, while the total porosity and capillary porosity increased in the plow layer of soil and other yield components as affected with humate potassium combined with 45 kg mineral N fertilizers under magnetic field at 15 min compared other treatments. Finally, The superior influence   faba bean quality was bio-fertilizer and potassium humate as will as presowing seed magnetic field at 15 min.