. Dry farming in relation to rainfall and evaporation . Fig. 4.—Chart showing the evaporation in inches during the six summer months from April to September, inclusive, for various points in the United States. The circles show stations where evaporation measure- ments are being made in connection with the field experiments of the Bureau of Plant Industry. The evaporation at these stations is measured in the same way and can be directly compared. Three years' records have been obtained for some of these stations, and there is little change in the evaporation from year to year. These figures rep
. Dry farming in relation to rainfall and evaporation . Fig. 4.—Chart showing the evaporation in inches during the six summer months from April to September, inclusive, for various points in the United States. The circles show stations where evaporation measure- ments are being made in connection with the field experiments of the Bureau of Plant Industry. The evaporation at these stations is measured in the same way and can be directly compared. Three years' records have been obtained for some of these stations, and there is little change in the evaporation from year to year. These figures representing the evaporation for equal periods then become very useful in comparing the conditions in different sections of the country from a dry-farming standpoint. Table I presents the results from which the accompanying map (fig. 4) was prepared and shows the total evaporation which took place from tanks during the six months from April to September, inclusive, for a number of points in the United States. The figures have been obtained from widely scattered sources, and the measurements were made with tanks of different sizes and exposed in different ways. 52102°—Bui. 188—10 2
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectdryfarm, bookyear1910
