. Elementary principles of agriculture; a text book for the common schools . Fig. 3i' \ii ill I. 1 â the root-growth of a com plant at silking time. After Hartley. United States Department of Agriculture. cultivation, the roots from the adjacent hills (three feet apart) had alread}' met. A few roots had reached a depth of twelve inches, but the bulk of the roots were within eight inches of the surface. Six inches from the hill, the main roots were within two or three inches of the surface. Midway between the drills they lay within four inches of the surface. Deep plowing at this time with shov
. Elementary principles of agriculture; a text book for the common schools . Fig. 3i' \ii ill I. 1 â the root-growth of a com plant at silking time. After Hartley. United States Department of Agriculture. cultivation, the roots from the adjacent hills (three feet apart) had alread}' met. A few roots had reached a depth of twelve inches, but the bulk of the roots were within eight inches of the surface. Six inches from the hill, the main roots were within two or three inches of the surface. Midway between the drills they lay within four inches of the surface. Deep plowing at this time with shovel-pointed plows would certainly have injured many roots.
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Keywords: ., bookauth, bookcentury1900, bookdecade1900, booksubjectagriculture
