. Elementary lessons in the physics of agriculture. Agricultural physics. [from old catalog]. 156 the supervision of Mr. C. G. Elliott, C. E., who describes the soil as a rich black loam, approaching black muck in the ponds and flats, underlaid with a yellow clay sub-soil at a depth of ' feet from the surface. The mains, Fig. 7, have a grade of two inches per 100 feet and the laterals not less than this and sometimes more. In draining this land the object was to fit it for growing corn, grass and grain in all Fi(/. 7. Showing: the drainage system on an 80 acre farm in Northern Ill
. Elementary lessons in the physics of agriculture. Agricultural physics. [from old catalog]. 156 the supervision of Mr. C. G. Elliott, C. E., who describes the soil as a rich black loam, approaching black muck in the ponds and flats, underlaid with a yellow clay sub-soil at a depth of ' feet from the surface. The mains, Fig. 7, have a grade of two inches per 100 feet and the laterals not less than this and sometimes more. In draining this land the object was to fit it for growing corn, grass and grain in all Fi(/. 7. Showing: the drainage system on an 80 acre farm in Northern Illinois after C. G. Elliot, C E. Double lines repiesent mains; singles lines, laterals, and the numbers express the length ol dr-einf and the size of tile used. It will be seen that the lateral drains are, where nearest, 150 feet apart; and it should be understood that this sys- tem is not intended to provide perfect drainage but rather, as good as would pay a fair interest on the investment under the returns of general farming. This figure may also serve to show how the sizes of tile are selected and placed with reference to the amount of work they are called upon to 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 King, F[ranklin] H[iram], 1848- [from old catalog]. [Madison, Wis. ] State journal printing company
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Keywords: ., bookcentury1800, bookcontributorthe, bookdecade1890, bookyear1891
