Answer:
John Deere invented the steel plow in 1837 when the Middle-West was being settled
Explanation:n 1837, Deere developed and manufactured the first commercially successful cast-steel plow. The wrought-iron framed plow had a polished steel share. This made it ideal for the tough soil of the Midwest and worked better than other plows. By early 1838, Deere completed his first steel plow.
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Features of the Indus Valley Civilization include its cities which were technologically advanced, transportation which was also advanced and a key
The Indus River valley civilization started about 2500 B.C.E, the largest city was Mohanjo-Daro. (river valley article) The River valley was at its peak and it was richest between 2600 and 1900 B.C. and lasted about 5 to 700 years. But the civilization started to fall apart between 1900 and 1700 B.C. (BBC) No one for sure knows what actually happened to the river valley civilization because there are no records. Scientists can only speculate. It’s been said the civilization was destroyed by invading barbaric tribes. It has also been said the Aryans, the next settlers may have been the ones to destroy it. (Thinkquest)
