الفهرس 
I- INTRODUCTIONOnly 14 pages are availabe for public view
Abstract
Abiotic stress such as drought and salinity are one of the challenges facing some countries of the world. Salt stress is a major environmental threat in agriculture sector. It requires the plant to grow perfectly need to easily absorb water and nutrients from the soil, as the salinity is detrimental to the growth of plants. The use of magnetic fields in agriculture reduces the harmful effects of salt water on plants. This study aims to investigate the effect of magnetic field, potassium silicate and magnetic iron on the growth of some medicinal and aromatic plants. This study was carried out on private farm, 80-kilometer Cairo- Alexandria desert road, Egypt, during the season from 2018-2019. To study the effect of electromagnetic water, potassium silicate (foliar application) and magnetic iron (as a soil conditioner) at different rates on growth parameters, yield, oil %, essential oil compounds and macro and micronutrients, content of Sweet Basil (Ocimum basilicum) and Thyme (Thymus Vulgaris) under saline irrigation water. The design was a split- split plot with twelve treatments and three replicates.
The obtained data showed that a positive effect for magnetic water treatment (MWT) interaction with magnetic iron (Fe3O4) at a rate of 150 mg/Kg on soil macro and micronutrients, Ca+, K+ content and decrease harmful Na+ and Cl- ions, while there is no effect on soil pH.
The obtained results represented that the interaction between magnetic water treatment (MWT) with potassium silicate (K2SiO3) at a rate of 150 mg/L gave the best values of growth parameters, total chlorophyll, oil% and leaves yield of the Sweet Basil plant. While MWT+ (Fe3O4) at a rate of 150 mg/Kg gave the best values of phenol, total content and uptake of N, P and K.
Also, data revealed that the interaction application of MWT+ magnetic iron (Fe3O4) at a rate of 150 mg/Kg gave a positive response of proline, phenol, total chlorophyll, oil% of Thyme plant, But MWT+ (K2SiO3) at a rate of 150 mg/L gave the positive effect of Thyme growth parameters, total content and uptake of N, P and K.
On the contrary, regard to essential oil compounds of Sweet Basil and Thyme plant data revealed that there were best significant values of major essential oil compounds under groundwater (GW) + magnetic iron (Fe3O4) at a rate of 100 and 150 mg/Kg.