. Bulletin of the Department of Agriculture. Agriculture; Agriculture. CAPILLARY MOVEMENT OF SOIL MOISTURE. 15 perature corresponding to the daily and monthly variations in tem- perature of the atmosphere at Riverside. A feature of the experiments not -usually included is a record of the quantity of water required to extend the moisture to various heights. Below is given a list of the vertical flumes and the soil placed in each. Flume 19 was filled with decomposed granite from Eiverside, Calif. Flume 43 was filled with heavy soil from Eiverside, Calif. Flume 63 was filled with heavy clay
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. CAPILLARY MOVEMENT OF SOIL MOISTURE. 15 perature corresponding to the daily and monthly variations in tem- perature of the atmosphere at Riverside. A feature of the experiments not -usually included is a record of the quantity of water required to extend the moisture to various heights. Below is given a list of the vertical flumes and the soil placed in each. Flume 19 was filled with decomposed granite from Eiverside, Calif. Flume 43 was filled with heavy soil from Eiverside, Calif. Flume 63 was filled with heavy clay soil from Whittier, Calif. Flume 80 was filled with gravel soil from Uplands, Calif. Flume 100 was filled with lava-ash soil from Central Idaho. Flume -209 was filled with sandy soil from Central Idaho. ^_ ]> â 20 , / £ '*> T 1 »T 1 s»(s> 1 ,/ T r '- â JOlO ^jJsSiT^ rffc4 â>.. :;:';. -. w -1 g* , -,.â â > -r- j-kt. i ,- t>: 't â ; n. 10 fi°l9,Riverside light soil, N°43. Riverside heavy soil /i°63, Whittier soil soil A'flOO, Idaho lava ash soil r/o209,ldaho sandy soil Fig. 2.âRate of movement of moisture in vertical columns of soil. The numbers-within circles indicate the'point at which that number of liters of water had been taken up. The moisture equivalent, in per cent, for these soils is as follows: Eiverside, light, ; Eiverside, heavy, ; Whittier, ; Uplands, ; Idaho lava-ash, ; and Idaho sand, Figure 2 shows the curve's derived from the measurements of the rate of movement of moisture in the flumes and the time of such measurements. The vertical element is the distance measured in inches and the horizontal element is the time in hours or days. The figure to the left shows the rate of movement by hours for the first 24 hours and the figures to the right the movement by days. The curves are parabolos or closely resemble parabolic curves. A very rapid movement of the moisture occurs for the first, f
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