A Portable Apparatus for Estimating Stomatal Aperture in Conifers
Pacific Northwest Forest and Range Experiment Station, U.S. Department of Agriculture, Forest Service, 1969 - 7 pagina's
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95-percent ethanol Alaska alcohol concentration allowed appears applied average begin conifers considered decrease described DESIGN determined Douglas-fir Douglas-fir needles eight end point ethanol-water mixture field Figure fluid FOREST Froeschel Fry and Walker fully open stomata gradually Growth chamber Headquarters higher hour hour of drying inch indicate individual values infiltration occurred infiltration values large number lecture bottle light Lower alcohol maintained Mature mean measure of stomatal method midrange of closure movement narrow needle and later needle chamber needle holder O-ring Observation obtained occurs open stomata opening in conifers Oregon p. s. i. or less partially closed stomata particularly Pass percent permits placed ponderosa pine portable apparatus precise present pressure required probably range RELATION relatively relatively low rest screw seal selected sensitivity shoot showed single solution species stopped suggests surface tension temperature terminal transpiration rate uniform usually Washington wider widths younger Zone