. Bulletin. Forests and forestry -- United States. P'lO. 51.—Percentage of evajjoratiou iu the woods as coiuparod with that iu open fields. season. The annual evai)oration in the A\oods is 44 per cent of that in the fields. Fig. 5L represents the percentage for the different months of the year. The upper straight line stands for 100 per cent, or the evaporation in the fields during the year, and the curve below repre- sents the percentage in the woods. The shaded space is the percentage 100. Fio. 52.—Ratio of evaporation from water surface in field (upper curve) and forest (lower curve) to pre
. Bulletin. Forests and forestry -- United States. P'lO. 51.—Percentage of evajjoratiou iu the woods as coiuparod with that iu open fields. season. The annual evai)oration in the A\oods is 44 per cent of that in the fields. Fig. 5L represents the percentage for the different months of the year. The upper straight line stands for 100 per cent, or the evaporation in the fields during the year, and the curve below repre- sents the percentage in the woods. The shaded space is the percentage 100. Fio. 52.—Ratio of evaporation from water surface in field (upper curve) and forest (lower curve) to precipitation (toj) line). of lield evaporation which is saved by the foics-t. This covers a full half of the diagram, with some addition to this from May to November. It is also interesting to compare the ev;ii)oratioii iVoiii a water surface with tlie precii>itation from month to month. Tliis is done in Fig. 52. 12444—No, 7 7. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. Division of Forestry. Washington : G. P. O.
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