excursionexfiltration flowexfoliation weatheringexhaust cloudexit channelexosphereexpanding hydraulic jumpexpansionexpansion jointexpansion waveexpasion channelexperimental modelexponentexponential extinction modelexponential functionexposureexprimental designexsiccationextensive croppingexternal forceextra terresrial radiationextraction wellextrapolationextratropical cycloneextremaextremeextreme pointsextreme valueseye of the stormeye of the windface plantingfacingfactorfactor of turbulencefactorial designfactors of rain erosionfaculative erosionfacultative organismfahrenheit scalefahrenheit temperature scalefall diameterfall velocityfalling head permeameterfalling massfalling tidefallowfallowingfanfanya juufarm