. Soil physics and management. winK th(; Uiroo types of mold-hoanlH. A-Hod. li-Gonoral pur|)OH(;. C-Stubhlo. soil is in good condition for plowing. If too dry so that the soilis cloddy little pulverization is accomplished. If the soil is too wetfor plowing this shearing hreaks down the granules, producing par-tial puddling, very injurious to the soil. The plow should be setso that the furrow-slice will he cut free from the soil heneath andpractically all inverted. Mold-hoard plows are divided into stuhhle,general purpose, and sod plows. 328 SOIL PHYSICS AND MANAGEMENT The stubble plow (Fig. 13
. Soil physics and management. winK th(; Uiroo types of mold-hoanlH. A-Hod. li-Gonoral pur|)OH(;. C-Stubhlo. soil is in good condition for plowing. If too dry so that the soilis cloddy little pulverization is accomplished. If the soil is too wetfor plowing this shearing hreaks down the granules, producing par-tial puddling, very injurious to the soil. The plow should be setso that the furrow-slice will he cut free from the soil heneath andpractically all inverted. Mold-hoard plows are divided into stuhhle,general purpose, and sod plows. 328 SOIL PHYSICS AND MANAGEMENT The stubble plow (Fig. 138C) has a short, strongly curvedmold-board and is probably the best form to use in old land. Ingeneral the more curvature or twist there is to the mold-board thegreater the pulverization, the better is the condition of the soil afterplowing, provided it has the proper moisture content. This plowis not desirable to use in breaking sod, because of the rough con-dition in which it leaves the surface. The jointer is sometimes used. Fig. 139. -Plow with separate jointer and rolling coulter attached ready for Company.) (Molina in the plowing of light sods, as it materially aids in turning underand preventing the further growth of grass (Figs. 139 and 1-iO). The general purpose plow (Fig. 138B) is a form intermediatebetween the stubble and sod plows in length and curvature of mold-board. It may be used for either stubble or sod. It does not pul-verize the soil so thoroughly as the stubble mold-board, and as a con-sequence it leaves sod in much better condition for working intoa good seed bed. For all uses it is probably the best. TILLAGE 329 Sod plows (Fig. 138A) have long, slightly curving mold-boardsthat do the minimum amount of pulverization in turning the fur-row-slice. They are used principally inthe plowing of tough grass sods, sincethey turn the furrow-slice withoutbreaking it very much, thus leaving acomparatively smooth plowed has some advantages in the
Size: 1747px × 1430px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookpublisherphila, bookyear1917
