. [Bulletins on forest pathology : from Bulletin , Washington, , 1913-1925]. Trees; Plant diseases. Fig. 1.—Jack-Pine Seed Bed, Garden City, Kans. Foreground untreated. Background treated with sulphuric-acid solution before germination. Stakes marked in inches. Note the difference in height of the seedlings after the first season's growth (F 3).. Fiq. 2.—Jack-Pine Seed Bed, Kansas Sandhills. Plat at left treated with one-fourth ounce and plat at center with three-eighths ounce of sulphuric acid per square foot. Plat at right untreated. Note the relative freedom from weeds in the tr
. [Bulletins on forest pathology : from Bulletin , Washington, , 1913-1925]. Trees; Plant diseases. Fig. 1.—Jack-Pine Seed Bed, Garden City, Kans. Foreground untreated. Background treated with sulphuric-acid solution before germination. Stakes marked in inches. Note the difference in height of the seedlings after the first season's growth (F 3).. Fiq. 2.—Jack-Pine Seed Bed, Kansas Sandhills. Plat at left treated with one-fourth ounce and plat at center with three-eighths ounce of sulphuric acid per square foot. Plat at right untreated. Note the relative freedom from weeds in the treated plats. The apparently thin stand of trees in the treated plats is due to the very small size of the young seedlings of this species of pine. Actual counts in these plats showed the stand to be as dense as can be grown without subsequent overcrowding. Photographed by Stephen C. Bruner (F 4).. 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. Dept. of Agriculture. [Washington : U. S. Dept. of Agriculture]
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisherwashi, bookyear1913
