. Bulletin of the Department of Agriculture. Agriculture; Agriculture. CORN IN THE GREAT PLAINS AREA. are water supply, physical condition of the seed bed, and a certain recognized, although not fully understood, effect of the crop immedi- ately preceding. Uniformity in these factors is largely restored by the cultivation or crop- ping of a single season. After a careful study of the data, it seemed ad- visable to present in this bulletin the yields of corn as determined by the cropping and treatment of the land in only the one year immediately preced- ing the growth of the crop. In the s
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. CORN IN THE GREAT PLAINS AREA. are water supply, physical condition of the seed bed, and a certain recognized, although not fully understood, effect of the crop immedi- ately preceding. Uniformity in these factors is largely restored by the cultivation or crop- ping of a single season. After a careful study of the data, it seemed ad- visable to present in this bulletin the yields of corn as determined by the cropping and treatment of the land in only the one year immediately preced- ing the growth of the crop. In the study that is here made only the more important and obvious results will be discussed. The tables themselves when crit- ically studied show much more than is here mentioned. No attempt is made to study rotations as a whole. There are cumulative effects of rotations and farm- ing systems that are not negligible, but which are not dis- cussed here. Other studies have shown that these effects are of far less immediate importance than the effect of the preceding crop, the preparation of the seed bed, and the seasonal conditions. AREA COVERED BY THESE STUDIES. The area (fig. 1) included in these investigations covers a part of ten States: Montana, North Dakota, South Dakota, Wyoming, Nebraska, Colorado, Kansas, Oklahoma, Texas, and New Mexico* It extends from the ninety-eighth meridian of longitude to the foot- hills of the Rocky Mountains and from the Canadian border to the thirty-second parallel of Fig. 1.—Sketch map of the Great Plains area, which includes parts of ten States and consists of about 400,000 square miles of territory. Its western boundary is indicated by the 5,000-foot contour. The location of each field station within the area is shown by a dot within a circle (©).. 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 perfect
Size: 1252px × 1997px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauth, bookcentury1900, bookdecade1910, booksubjectagriculture
