Effect of Magnetized Water and Nitrogen Fertilization on Soil Properties and Its Productivity of Eggplant

A FIELD experiment was carried out on a private farm in Meet Khakan, Shebin ElKom, Menofia Governorate, Egypt, for two successive growing seasons in winter 2021/2022 and 2022/2023. The purpose of this study was to investigate the influence of magnetized water at various N fertilizer application rates on some soil chemical parameters as well as eggplant production (quantity and quality). To attain this goal, non-magnetized well water and magnetic well water were employed for irrigation. Furthermore, N fertilizer (NH 4 NO 3 ) was applied at rates of 25, 50, and 100% of the recommended dose. Except for the BOD value, non-magnetized water had a higher pH, EC (dS m -1 ), and soluble cation and anion content than magnetized water. At the same soil depth and applied N level, the soil irrigated by magnetized water has low values of pH, EC, and the content of soluble cations (except for K + ) and anions. Irrigation with magnetized water, as well as an increase in added N, resulted in an enhance in plant height (cm), number of leaves per plant, leaf dry matter yield per plant, fruit length and diameters (cm), and fruit yield (kg m -2 ) compared to plants irrigated with nonmagnetic water, while flowering data (50%) shows a reversible trend. With the same rate of added N, the plant irrigated by magnetized water have a high content of N, P, K, Fe, Mn, Zn and Cu .