John Deere 1 As settlers in the United States moved westward, plowing of the black prairie soils, high in organic matter, posed a special problem to the farmers who had cast-iron and iron-patched plows. Wooden plows were no match for the sticky, thick clay soils encountered by settlers of the Central Plains of Wisconsin, Illinois, and Indiana. Even the iron plows invented by Charles Newbold of New Jersey in 1703 and by Jethro Wood of Massachusetts in 1819 …
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showed last 75 words of 1208 total
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