. Carnegie Institution of Washington publication. AGRICULTURAL PRACTICE AND CLIMATIC CYCLES. 267 (fig. 16) shows five 2-year and two 3-year cycles since 1900, while the record since 1885 shows an almost complete series of 2-year cycles. The Cheyenne graph shows a preponderance of 3-year cycles, and with the exception of a single year (1908), there is a perfect succession of 2-year and 3-year cycles. At Akron the first two cycles are 2-year and the last three are 3-year. At Amarillo the cycles are much less distinct, but the 3-year cycle is fairly well marked, especially in the seasonal rainfal
. Carnegie Institution of Washington publication. AGRICULTURAL PRACTICE AND CLIMATIC CYCLES. 267 (fig. 16) shows five 2-year and two 3-year cycles since 1900, while the record since 1885 shows an almost complete series of 2-year cycles. The Cheyenne graph shows a preponderance of 3-year cycles, and with the exception of a single year (1908), there is a perfect succession of 2-year and 3-year cycles. At Akron the first two cycles are 2-year and the last three are 3-year. At Amarillo the cycles are much less distinct, but the 3-year cycle is fairly well marked, especially in the seasonal rainfall. A comparison of the respective graphs will disclose the regional rainfall balance during a particular year. The year 1905 was excessively wet at Amarillo, Akron, and Cheyenne, but was very dry at Williston, 1906 being the wet year. Likewise, a slightly less wet year (1915) was excessively wet at Amarillo and Akron, only a little above the normal at Cheyenne, and slightly below normal at Williston, the excess falling the next year again. The year 1911 was the driest of the record at. ao Illiillfl i M M111M â i 1900 1905 1910 1915 Fig. 19.âGraph of total and seasonal rainfall at Amarillo, 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 Carnegie Institution of Washington. Washington, Carnegie Institution of Washington
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