. Bulletin. Agriculture. THE AGRICULTURAL FUTURE OF THE REGION. 29 seasons and on late plowing. It may be of no benefit in a wet season and may be harmful on lieavy soil. There are various types of corrugated rollers and special subsurface packers made for this purpose, and tJie work may be done with tlie common disk by setting it straiglit and weighting it to make it run deep. Subsurface packing is important not only on summer-tilled but also on spring-plowed land that is to raise a crop the same season. In western Kansas and eastern Colorado the lister is very much in favor and the farmers u
. Bulletin. Agriculture. THE AGRICULTURAL FUTURE OF THE REGION. 29 seasons and on late plowing. It may be of no benefit in a wet season and may be harmful on lieavy soil. There are various types of corrugated rollers and special subsurface packers made for this purpose, and tJie work may be done with tlie common disk by setting it straiglit and weighting it to make it run deep. Subsurface packing is important not only on summer-tilled but also on spring-plowed land that is to raise a crop the same season. In western Kansas and eastern Colorado the lister is very much in favor and the farmers use it for every possible purpose. Most of the few who have done any summer-tilling do not plow the ground but list the land that is to be simmier-tilled just after they get through. Fig. :}.—a summer-tilled field where winter wheat will be grown, adjacent to the field shown in figure 2. planting corn (fig. 4), then throw down the ridges. About the last of June or the first of July they list again, splitting the middles left by tlie first listing. They then throw down the ridges and do what- ever additional cultivation is necessary to keep down the weeds and maintain the surface mulch. This is a cheaper way of doing the work than plowing, because less cultivation is required. It has an advantage also in the fact that if the weeds attain an}' considerable size (which should never be allowed), the ridges enable tlie farmer to kill the weeds without plowing the ground. It does not seem to the writer, however, that this method can, on the average, produce as favorable results as that previously described, although there are no data at hand to show the comparative values of the two methods. 215. 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 : G. P. O.
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