Tea
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Browsing Tea by Subject "Evaporation"
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Item EDDY CORRELATION MEASUREMENTS OF CONVECTIVEHEAT FLUX AND ESTI:MATION OF EVAPORATIVE HEAT FLUX OVER GROWING TEA(1979) Woodhead, T.; Callaunder, B. A.The EAAFRO catchment experiments (Pereira et al., 1962) were designed and executed to investigate the water use of different Vegetative covers, including tea estates, over periods of the order of a year. The eddy correlation experiment reported here, by providing Estimates of daily evaporation over several days, offers an independent check on the catchment results; another method of water use estimation, through a monitoring of soil moisture changes, is described in Section 2.2.3. Much valuable information would be available if the changes of water use from day to day and within a day could be measured and understood. This eddy correlation experiment was therefore designed to yield additional data on the pattern of evapo transpiration from tea within a day.Item A Study of the water use of tea in East Africa using a Hydraulic Lysimeter(1970) Dagg, M.; Physics and Chemistry Division, East African Agricultural and Forestry Research OrganizationA hydraulic lysimeter, 10 × 10 × 6 ft. deep (3.05 × 3.05 × 1.83 m), has been used to measure the monthly evapotranspiration over a period of 35 months from eight tea bushes planted to be uniform with an extensive area of tea at the Tea Research Institute of East Africa, Kenya. Tests on the performance of this inexpensive lysimeter showed it to be operating satisfactorily and capable of producing valid evapotranspiration data over periods of a few days. The tea was never under serious moisture stress and advection effects were likely to be minimal, with the fetch of the prevailing wind being over 30 km of evergreen moist forest. Monthly evapotranspiration rates (Et.) from the young tea crop varied from 40 to 115 mm per month, but were satisfactorily predicted (r = 0.85), both in wet and dry months, by the relation:....
