. The potato; a practical treatise on the potato, its characteristics, planting, cultivation, harvesting, storing, marketing, insects, and diseases and their remedies . FIG. 27—ASPINWALL POTATO PLANTER (SIUE VIEW) a man to work it. Some planters require one man,others two men, to work them; the latter generallydo the best work, although good work is done by theformer. Two systems of mechanism are employed—thepicker and the platform. In some planters the tubersare fed from the hopper onto pickers, or spikes, whichprojecft from a revolving vertical disk. The diskcarries them round to the top of
. The potato; a practical treatise on the potato, its characteristics, planting, cultivation, harvesting, storing, marketing, insects, and diseases and their remedies . FIG. 27—ASPINWALL POTATO PLANTER (SIUE VIEW) a man to work it. Some planters require one man,others two men, to work them; the latter generallydo the best work, although good work is done by theformer. Two systems of mechanism are employed—thepicker and the platform. In some planters the tubersare fed from the hopper onto pickers, or spikes, whichprojecft from a revolving vertical disk. The diskcarries them round to the top of a delivery pipe, wherethey are knocked off, or fall off, going down the pipe I02 THE POTATO to the ground. This system, or a modification of it, isused in the Aspinwall (Figs. 26-27), the Deere, and thethe Eureka planters. Trials with a planter of this typeshowed that, with small whole seed and well-preparedground, this machine will work up to its guarantee of95 per cent.; that is, it will not skip more than 5 placesin 100. With longer cut seed and rougher land, espe-. FIG. 28—THE IMPROVED PLANTER cially if slightly hilly, it will miss up to 20 in 100. Ifthese misses were distributed it would not be so serious,but often 5 or 6 occur at a .stretch. If the seed is cutlong and thin, the pickers ma} take hold of two piecesinstead of one. This happens frequently—often up to20 per cent. These machines open the furrow, distributethe fertillizer, plant the potato, and cover. The latteroperation is usually performed by revolving concavedisks. The distance apart of the tubers is regulated byadding or removing the pickers. The higher-priced PLANTING 103 machines are stronger made than the lower-priced,and, in some cases the fertiHzer attachment is extra. The Robbins improved potato-planter (Fig. 28) is ofthe platform type. The potatoes are elevated from thehopper by means of a wheel, and are discharged onto aplatform which is cleared by several revolving arms(Fig. 29); th
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