. Biology of deserts : the proceedings of a symposium on the biology of hot and cold deserts organized by the Institute of Biology. Deserts. /NFLUENT/AL fPA/NFALL -/A/CHES PEP MONTH AVA/LABl-E FOP TPANSP/RAT/ON 885 1890 1895 1900 1905 1910 1915 1920 1935 1930 1935 1940 1945 1950. z EFFECTIVE INCHES PER EFFECTIVE 1885 1890 1895 1900 1905 1910 1915 1920 1925 1930 1935 1940 1945 1950 Figure 2. Influential Rainfall — inches per month available for transpiration — Yudnapinna. of May to August inclusive, and particularly in June. The expected occurrence of monthly rainfall exceeding ^'^^ (Table
. Biology of deserts : the proceedings of a symposium on the biology of hot and cold deserts organized by the Institute of Biology. Deserts. /NFLUENT/AL fPA/NFALL -/A/CHES PEP MONTH AVA/LABl-E FOP TPANSP/RAT/ON 885 1890 1895 1900 1905 1910 1915 1920 1935 1930 1935 1940 1945 1950. z EFFECTIVE INCHES PER EFFECTIVE 1885 1890 1895 1900 1905 1910 1915 1920 1925 1930 1935 1940 1945 1950 Figure 2. Influential Rainfall — inches per month available for transpiration — Yudnapinna. of May to August inclusive, and particularly in June. The expected occurrence of monthly rainfall exceeding ^'^^ (Table 1.) confirms the greater reliability of favourable soil moisture conditions in winter, (Cornish, 1952). The monthly values for influential rain have been summed to give a seasonal value; the mean influential seasonal rainfall for 67 years is inches and the mean number of months with effective precipitation is months per annum. Years with a seasonal value of less than inches of effective rain have been classified as drought seasons, and those with a value greater than 2,0 inches have been classed as seasons favourable for herbage production. The amount of growth that can be made on limited quantities of available mois- ture has been assessed in field and glasshouse studies of transpiration in relation to growth. These indicate an average value for Kochia and Atriplex spp. of 3 cwt. dry material per acre inch of water transpired, and this appears to be capable of suppor- ting a sheep on 20 acres, or 32 sheep to the square mile for a period of 12 months. ^-'''^ is equivalent to °-^5 (Prescott, et al., 1952). 131. 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 Cloudsley-Thompson, J. L. London : Institute of Biology ; New York : Hafner
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Keywords: ., bookcentury1900, bookcollectionbiodiversity, booksubjectdeserts
