Evaporation losses in irrigation and water requirements of crops . tubes Avereplaced 9 inches beloAV the surface; in tanks 3 and 7 they Avere placed6 inches beloAv, Avhile in tanks 4 and 8 they were placed 3 inches be-loAV the surface. Before AA^eighing, 2 inches of dry-soil mulch Avasplaced on the surface of each tank. The soil contained at the beginning of the experiment on August 27 23, 1905, tlio following avcrago peicentages of free water at difFerentdepths: Per cent. G inches below surface 4. 19 12 inches lielow surface , 3. 7!) 124 inches below surface ^ 36 inch below surface 4. 96
Evaporation losses in irrigation and water requirements of crops . tubes Avereplaced 9 inches beloAV the surface; in tanks 3 and 7 they Avere placed6 inches beloAv, Avhile in tanks 4 and 8 they were placed 3 inches be-loAV the surface. Before AA^eighing, 2 inches of dry-soil mulch Avasplaced on the surface of each tank. The soil contained at the beginning of the experiment on August 27 23, 1905, tlio following avcrago peicentages of free water at difFerentdepths: Per cent. G inches below surface 4. 19 12 inches lielow surface , 3. 7!) 124 inches below surface ^ 36 inch below surface 4. 96 Average 4. 34 The valve was so adjusted that it required forty-two hours for the contents of the lO-gallon can to pass thru the tubes into the subsoil. It was quite noticeaI)le that in the deeper tubes the water disappeared more quickly than in shallow accompanying diagram (hg. (>) shows the appearance of the surface of the tanks as regards moisture at five different times during the first sixty-three hours, the shaded areas representing wet
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Keywords: ., bookcentury1900, bookdecade1900, bookpublisherwashingtondcusgpo
