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Forestry 1958 31(2):167-176; doi:10.1093/forestry/31.2.167
© 1958 by Institute of Chartered Foresters
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MOISTURE AND TEMPERATURE CONDITIONS IN AFFORESTED AREAS IN ABERDEENSHIRE

J. R. H. COUTTS

Department of Soil Science, University of Aberdeen

  1. Soil temperature measurements in a forestry plantation at Birkhall, near Ballater, Aberdeenshire, have been maintained from January 1952 onwards, and the present paper extends the results already published (Quart. J. Roy. Met. Soc. lxxxi (1955), 72) with regard to soil temperature profiles, frost occurrence, and the efficiency of daily maxima and minima of temperature in the estimation of mean weekly temperatures.
  2. Results are given for the interception of rain by vegetational covers of various types and for the differences in moisture status that occur between soils in an open ride and under the forest canopy.
  3. The amplitudes of diurnal temperature fluctuations in the ride and under the forest canopy have been compared. Over the period August 1954 to December 1956, the latter average about 60 per cent, of the former; there are, however, large differences between the results for the dry conditions in 1955 and the wet conditions in the later months of 1956, and consideration is given to the factors contributing to these differences.
  4. The mean temperatures in the ride are higher than those under the canopy between April and September; the greatest differences, which are of the order of 1° C., occur in the later part of the spring and the earlier part of the winter.


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