![]() ![]() Then, we will use the dynamic isotherm to derive the corresponding relative humidity values for different soilmedia. ![]() Based on results from objective1we will determinefor each of the samples soil water contents below and above the mono-layer water content. We assume that under such conditions more mineral surfaces are available for sorption. We selected these minerals and the benchmark soils for fundamental analysis to test the applicability of this method to Alabama soils.The equilibrium isotherms will be used to calculate the mono-layer water content&theta MLas described by Karathanasis and Hajek (1982) utilizing BET theoryObjective 2: Determine The Effect of Relative Humidity onPesticide VolatilizationWe hypothesize that less2,4-D will volatilize if the soil water content is below the mono-layer water content. Project Methods Objective 1: Develop Water Vapor Isotherms and Calculate Mono-Layer Wa- ter Contents for Selected Reference Minerals and Selected Surface Horizons Collected From Alabama Benchmark SoilsWe will develop water vapor isotherms for different media (reference quartz, kaolinite and montmorillonite minerals, as well as surface horizons collected from Alabama benchmark soils). ![]()
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