File:Corn; growing, judging, breeding, feeding, marketing; for the farmer and student of agriculture, a text-book for agricultural colleges and high schools (1908) (14774652941).jpg

Identifier: corngrowingjudgi00bowm (find matches)
Title: Corn; growing, judging, breeding, feeding, marketing; for the farmer and student of agriculture, a text-book for agricultural colleges and high schools
Year: 1908 (1900s)
Authors: Bowman, Melville LeRoy, 1881- (from old catalog) Crossley, Bruce William, 1886- (from old catalog) joint author
Subjects: Corn
Publisher: Ames, Ia., The authors
Contributing Library: The Library of Congress
Digitizing Sponsor: Sloan Foundation

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ne kernel. Moreholes were made in the plate, which was continuously turned by themain axle of the planter. This formed a cumulative drop which, whensufficient kernels had been counted out, were checked off by the wire.For growers who produce corn of a uniform type and who grade theseed closely, the edge drop plate has proved of greater accuracy. How-ever, in planting kernels of different lengths the plates must be cali-brated closely. Every farmer knows the tendency of planters to carry the kernels Edge-drop 168 CORN. before droppini:^. which results in a zigzag appearance of the corncrossways of the field. In purchasing a planter, this factor shouldbe looked into. The valves should work quickly. The runner lurrow-openers which have always been used on cornplanters, sometimes fail to give satisfaction on sod land, or in fieldswhich are crowded with trash. The planter will often ride out, leav-ing the corn uncovered. In an effort to prevent this di:-c furrow-open- Types ofplanterwheels
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(Courtesy Janesville irachine Co.) Fig. 81. CORN PLANTER.Showing the long curved runner furrow-openers and open wheels. ers are sometimes attached. The disc also pulverizes the soil inwhich the kernel is to rest. Except under the conditions mentionedthese attachments are unnecessary. Both single and double-disc fur-row-openers tend to make the planter harder to guide. On the rougher and more rolling corn lands, the concave planterwheel is used because the fields are harrowed immediately afterplanting. This practice does away with two disadvantages, featuresof the concave wheel; the tendency to leave a furrow for washing,and the smooth surface which dries out badly. The open wheel isbetter for level lands not subject to washing. It has a little more TIME OF PLANTING. 169 draft, but leaves no flat surface to bake in the sun. The double wheeltends to cover the hill more surely. Improved methods of culture together with the increasing preval-ence of weeds have caused the practice of check

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