What are five major inventions that improved agricultural output between 1750 and 1870?

One of the major inventions that improved agricultural output between 1750 and 1870 are:
- Cotton gin : Eli Whitney invents the cotton gin in 1793, which contributes to the success of cotton as a Southern cash crop.
- iron plow : Jethro Wood invented the iron plow with interchangeable parts in 1819
- Factory-made agricultural machinery (1840s)- this  encouraged commercial farming
- chemical fertilizers were sold commercially (1849)
- Steam tractors are tried out

On april 20, 1814, the dethroned emperor left france for the isle of  elba, where he was exiled under the terms of the treaty of fontainebleau.napoleon  would be allowed to ruleelba, which had 12,000 inhabitants. perhaps cruelly, the treaty allowed him to retain the title "emperor."