Page:Report of the Oregon Conservation Commission to the Governor (1908 - 1914).djvu/153

Rh But few people realize the fact that the average precipitat on in the Willamette Valley during June, July, and August is less than that which occurs at many points in the arid region, and far ieas than that whieh occurs in humid regions This is strikingly illustrated by the accompanying diagram, which has hen prepared from the official records of the Lrnited States weather bureau.

20 In’ t:12 2 PrecipitAtion in the WI I Ianiettc VJ ky S h(!. S I,-. 1 A oanoare4 with other Points fl OI€ !r]d awt t,’iofld r,gk.n,.

The average precipitation at Corvallis during these three cropproducing months of the year is 1.8 inches, and at Eugene 2.6 inches. as compared with 4.4 inches at Denver, Cob.. 5.0 inches at Cheyenne. Wyo., and 6.2 inches at Santa Fe, New Mexico. In irrigated sections during this period crops will receive 20 to 36 inches of water, or from eight to twelve times that received by Willamette Valley orop from natur& rain fall

That irrigation in the Villamette Valley is profitable has been actually demonstrated by several private agencies as ‘veil as by experiments by the Government. Along Dairy Creek, in Washington County, thret crops of clover have been cut CogIe — Ni FIG. II.