. Circular. Agriculture; Agriculture -- United States. 28 CIRCULAR NO, 121, BUREAU OF PLANT INDUSTRY. season, but salt determinations made at different times show a decided reduction in the salt content of the upper 12 inches of soil. The average salt content of the upper 12 inches of soil on plats M-I-5 to M-I-9, mclusive, in September, 1911, was per cent. By September, 1912, the percentage of total salts in the same plats had been reduced to an average of About 10 acres of the land have been planted to wmter lye for two seasons. Both crops of rye were produced without irrigation,
. Circular. Agriculture; Agriculture -- United States. 28 CIRCULAR NO, 121, BUREAU OF PLANT INDUSTRY. season, but salt determinations made at different times show a decided reduction in the salt content of the upper 12 inches of soil. The average salt content of the upper 12 inches of soil on plats M-I-5 to M-I-9, mclusive, in September, 1911, was per cent. By September, 1912, the percentage of total salts in the same plats had been reduced to an average of About 10 acres of the land have been planted to wmter lye for two seasons. Both crops of rye were produced without irrigation, the winter rains and snows giving sufficient moisture. The crop was plowed under m May each year and the land kept in good tilth throughout the remainder of the season in order to prevent the evaporation of water from the surface and the consequent accumu- lation of salt in the upper layer of the Fig. (i. -A plat of rye on the Wonieii tract in May, 1912. Rye was grown here in 1911 and 1912, the .sefond crop l:)einK heavier and more uniform than the first. The green crop has been plowed under each year to improve the physical condition of the surface soil. Salt determmations have not been systematically made on the rye land, so that it is not known to what extent the salt content of the surface soil has been reduced. The growth of rye (fig. 6) was much heavier and more uniform in 1912 than it was m 1911, and the soil tOth was decidedly better, so that the plowing under of the rye crop appears to have had a beneficial effect. Durmg the season of 1913 salt determinations will be made regularly and the salt content of the rye land will be compared with that of the adjacent virgin soil. [Cir. 121]. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. Bureau of Plant Industry. Washington, D. C. :
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