. Bulletin. 1901-13. Agriculture; Agriculture. METHOD OF CONDUCTING THE EXPEEIMENTS. 9 The size of the plats was left to the cooperator. In the work from 1906 to 1910 the plats consisted for the most part of five rows each, making with the one intermediate row which was discarded at har- vest, 11 rows in the experiment. In the work of 1911 most of the experiments were conducted on four plats of five rows each, with three intermediate rows, one between every two plats, which were discarded at harvest. The length of the plats varied with the con- venience of each man, the average length being ab
. Bulletin. 1901-13. Agriculture; Agriculture. METHOD OF CONDUCTING THE EXPEEIMENTS. 9 The size of the plats was left to the cooperator. In the work from 1906 to 1910 the plats consisted for the most part of five rows each, making with the one intermediate row which was discarded at har- vest, 11 rows in the experiment. In the work of 1911 most of the experiments were conducted on four plats of five rows each, with three intermediate rows, one between every two plats, which were discarded at harvest. The length of the plats varied with the con- venience of each man, the average length being about 250 feet. After planting, one plat or series of plats was to receive absolutely no cultivation, the weeds and grass being removed at frequent intervals. Fig. 1.—Typical appearance of the soil on a cultivated plat of corn. by means of a sharp hoe. This hoe was to be used with a horizontal stroke to cut off the vegetation at the soil surface, and particular care was to be paid not to stir the soil any more than was absoluteh' necessary. The other plat or series of plats was to receive the ordi- nary cultivation and in addition to have the weeds and grass removed by chopping so as to eliminate the weed factor. Figure 1 shows the typical appearance of the soil on a cultivated plat and figure 2 on an uncultivated plat when the plants had reached the tasseling stage. These illustrations show the tests at the Arhngton Experimental Farm on a stiff clay soil where the surface of the uncultivated jilats was nearly as (hy and hard as a floor. 51092°~Bul. 257—12 2. 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, Soils, and Agricultural Engineering. Washington Govt. Print. Off
Size: 1777px × 1406px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., boo, bookpublisherwashingtongovtprintoff, booksubjectagriculture
