. Bulletin of the Department of Agriculture. Agriculture; Agriculture. 6 4!)S, r. s. APARTMENT 01 agriculture. Table II.â Monthly and annual precipitation at Grass Valley and Mow, Oreg., showing the average, maximum, and minimum, for each month, from V>u5 to 1915, inclusive. [Precipitation data (in inches): Previous to December. 1 â . to<.», from the rcgon-Washington Railroad & Navigation Co., Grass Valley, <»reg.: since December, 1909, from the substation records. T=trace.] Year. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. Oct. Nov. Dec. An- nual. 1905
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. 6 4!)S, r. s. APARTMENT 01 agriculture. Table II.â Monthly and annual precipitation at Grass Valley and Mow, Oreg., showing the average, maximum, and minimum, for each month, from V>u5 to 1915, inclusive. [Precipitation data (in inches): Previous to December. 1 â . to<.», from the rcgon-Washington Railroad & Navigation Co., Grass Valley, <»reg.: since December, 1909, from the substation records. T=trace.] Year. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. Oct. Nov. Dec. An- nual. 1905 .55 .95 .85 . 18 .02 .46 .23 .68 .68 .63 .25 .69 .76 .11 .10 .11 .10 .66 .35 .78 .58 .65 .90 .49 .76 .89 .37 .99 .89 .64 .42 . 66 .36 T .30 .22 .10 T .00 .02 .06 .08 .57 T .34 .71 .34 .02 .00 T .T4 .05 T .05 .35 .50 .12 .45 .20 .21 .49 T .20 .87 .70 .33 .78 .23 .30 .88 .88 .61 .88 1906 1907 13. 13 190S 1909 1910 1911 1912 1913 1914 1915 .55 .87 .02 .76 .05 .59 .03 .49 .89 .37 .16 .57 .00 .20 .74 .00 .84 .12 .81 T .30 .61 The distribution of the precipitation usually is favorable for grow- ing cereals, nearly all of the rain falling during the months from. Fig. 4.âExperimental plats at the Moro substation in the spring of 1916, showing the run-oil' during the melting of a heavy covering of snow. September to June. July and August are practically rainless. In some years there is considerable run-off in the winter or early spring (fig. 4). Soil samples taken to a depth of 6 feet on 20 plats in May, 1913, had an average of only 1 per cent more moist
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