I test the effect of 0,2 mM of Cd for my plant hydroponically, and I want use the equivalent of this dose in the field in soil, but I don't knew how convert it!!
Dear Mr. Mohammed:
There is no simple conversion. That is because there are many processes in soil that control soil-solution Cd, such as adsorption, precipitation, chelation, etc. (assuming that your hydroponic Cd is similar to soil solution Cd). To me, you should run a Cd sorption isotherm, using your soil and appropriate equilibrium solution (e.g., 10 mM CaCl2).
Il faudra d'abord calculer la capacité de rétention de ton sol et tu apporteras donc la quantité nécessaire de Cd à 0.2 mM et tu auras donc la quantité que tu pourra exprimer en mg/kg de terre.
Mesnoua,
If you have a specific field soil in mind, you can conduct a sorption isotherm on that particular soil with Cd. That isotherm will provide the mathematical relationship between the Cd in solution (analogous to your hydroponic Cd concentration) and Cd on the soil (mg Cd/kg soil, which is what you want to know).
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