Archive image from page 111 of Cyclopedia of farm crops . Cyclopedia of farm crops : a popular survey of crops and crop-making methods in the United States and Canada cyclopediaoffarm00bailuoft Year: 1922, c1907 The double-shovel plow in 1820, used until very recently. general increase in yield was 400 to 500 per cent of increasing yield, but that a greater increase i manuring. The first rotation-farming to gain wide attention in North America seems to have been the so-called Norfolk system. This was chiefly a four-crop rotation employed on the light lands of Norfolk, England, and which had
Archive image from page 111 of Cyclopedia of farm crops . Cyclopedia of farm crops : a popular survey of crops and crop-making methods in the United States and Canada cyclopediaoffarm00bailuoft Year: 1922, c1907 The double-shovel plow in 1820, used until very recently. general increase in yield was 400 to 500 per cent of increasing yield, but that a greater increase i manuring. The first rotation-farming to gain wide attention in North America seems to have been the so-called Norfolk system. This was chiefly a four-crop rotation employed on the light lands of Norfolk, England, and which had grown up during a long course of years. A century and more ago this system was explained by writers and thereby became widely known, the more so because at that time the American agricultural literature was drawn chiefly from English sources. An account of ' the Improvements made in the County of Norfolk' comprised the larger part of Jared Eliot's 'Fourth Essay upon Field Husbandry,' published at Killingworth, Connecticut, in 1753. The exact rotation itself—comprising roots, barley, clover, wheat, in various combinaticns—was of less impor- tance to the American colonies than the fact that attention was called to the value of rotation-farming in general. At the same epoch another system of farming practice was also coming in from English sources. This was the clean- tillage system introduced by the epoch-making experiments of Jethro Tull. Between the discussions of the Tull ' new husbandry ' and the Norfolk rotations, agricultural practices were challenged and overhauled in the new country. One of the early explanations of the good results of rotation of crops was the doctrine that some plants exhaust the soil of certain materials which are not needed by other plants; therefore the value of rotation depended on securing such a combination of crops as would in time utilize all the elements of the soil. There is, of course, some truth in this teaching, but we now know that the
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