. Soils, their properties and management. Soils. TTIE NITROGEN CrCLE 458 Month April May June July- August NiTB^TES IN Dry Soil, Parts TO THE Million. The amount of nitrogen removed by the maize crop was greater than that removed by the timothy; conse- quently the greater amount in the former soil cannot be due to the effect of the crop. So far as the conservation of nitrogen is concerned, sod is an ideal crop, for nitrates are formed very little faster than they are used, and are not carried of! in large quantities by the drainage water. In the corn land as much as 175 p
. Soils, their properties and management. Soils. TTIE NITROGEN CrCLE 458 Month April May June July- August NiTB^TES IN Dry Soil, Parts TO THE Million. The amount of nitrogen removed by the maize crop was greater than that removed by the timothy; conse- quently the greater amount in the former soil cannot be due to the effect of the crop. So far as the conservation of nitrogen is concerned, sod is an ideal crop, for nitrates are formed very little faster than they are used, and are not carried of! in large quantities by the drainage water. In the corn land as much as 175 pounds of nitrate nitrogen was present in the first twelve inches of one acre, or fully three times as much as was used by the crop. 372. Depths at which, nitrification takes place. — War- ington ^ concluded from his experiments that nitrification takes place only in the surface six feet of soil. HalP has pointed to the fact that no more nitrates were leached from the 604nch lysimeter at Rothamsted than from the one 40 inches deep; which is very good evidence that in iWarington, R. On the Distrihution of the Nitrifying Organism in the Soil. Trans. Chem. Soc, Vol. 51, p. 118. 1887. 2 Hall, A. D. The Book of the Rothamsted Experiments, p. 230. New York, 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 Lyon, T. L. (Thomas Lyttleton), 1869-1938; Fippin, Elmer O. (Elmer Otterbein), 1879-1949; Buckman, Harry Oliver, 1883-. New York, Macmillan
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