Global Journal of Science Frontier Research, D: Agriculture and Veterinary, Volume 23 Issue 1

preferring the conditions that make their overall SHC in a state of equilibrium by the potential transpiration with a minimal consumed mechanical energy in order to achieve the potential yield. As SHC reveals the overall interaction between the ecosystem components (Eqs. 6, 7 and 8), the managerial practices affect the plant, soil and atmosphere and their interaction each to other may affect it. Treating the plant and soil with silica affects SHC (Figs. 8). The anti-transpirants cause roots hydraulic redistribution, magnetic water causes stress signals reduction, genetic transfer from halophytes to salt sensitive plants creates a new plant variety able to concentrate its root sap and increase its strain, organo-nanoparticles conditioners maintain the soil bed, harvest the atmospheric humidity and reduce the water losses via evaporation, leaching and deep percolation (Hegazy, 2002), treating the atmosphere with chemtrial gas causes a reduction in global warming and climatic changes and…etc. may all affect the SHC in many degrees of extend start in vivo by increasing the strain signal of root sap and extend in vitro by lowering the environmental abiotic stress signals but their quantitative responses should have put under the macroscopic point of view in another research. In the agro-lands of MENA countries with marine and lacustrine origins, the overexploitation of groundwater under the conditions of water scarcity and global climatic changes causes the intrusion of seawater. As the saline water intrudes the variably saturated zone under a harsh extreme condition, the potentially guided Darian flow charges the capacitors from the bottom upwardly. Charging the capacitors in the electrical model defined by Hillel (2002) is different than that of the AMUN_SHC electrical model as the former did not consider that water quality affects its uptake. For instance, the water salinity decreases the availability of irrigation water. AMUN_SHC model takes the concept of total energy states into consideration. Assessing the impact of specific ion toxicity has a certain value of salt index under abiotic stress conditions may be achieved by making SSI speciation. The latter speciation may be done in order to know the combined stress of drought, salinity and specific ion toxicity such as in the case of using potassium chloride instead of potassium sulfate fertilizers. SSI speciation, SSIS, is still under investigation. Moreover, SSIS needs to be validated when assessing the impact of saline contaminated groundwater with iron and manganese on plant growth under deficit irrigation scenario. Estimating the root water uptake when using the stress form of modified Richard’s equation, SSI*Β, involves the term soil hydraulic capacitance. SHC represents the response of the soil moisture reservoir toward a certain plant water demand under a certain atmospheric condition. Soil profile consists of layered capacitors. Each of which is recharged during the infiltration by precipitation, irrigation or both forming the constant shaped soil moisture profile. The easy available water is being stressed by discharging the soil capacitors during the root water uptake creating the variably saturated zone. In between the sink: source terms of Richard’s equation, the discharge: recharge terms of soil capacitors or the root uptake: hydrological release terms, root navigates soil capacitors categorizing their energy states to select what has the easiest available water and bath to pass in order to water by exerting a minimum consumed © 2023 Global Journals 1 Year 2023 40 Global Journal of Science Frontier Research Volume XXIII Issue ersion I VI ( ) energy. SHC depends on soil genesis, plant species, varieties, ages and adaptability, atmospheric conditions and the high tensile strength of liquid phase. Under deficit irrigation and or the harsh extreme conditions of aridsols, SHC determines the types of water uptake in accordance with weathering induced stress- strain signaling devices. The IV. C onclusion D The Modified Richard’s Equation for Assessing the Impact of Drought and Salinity in Arid and Semi-Arid Zones. Part Two: A Soil Hydraulic Capacitance