Why did many federalists question the constitutionality of the louisiana purchase?

As seems to happen so often in politics, the Federalists opposed the Louisiana Purchase not on principled grounds but because they thought it would hurt them politically. They claimed to oppose the Purchase because it was unconstitutional. ... In general, the Federalists were an elite party of New England merchants.

Agricultural mechanization implies the use of various power sources and improved farm tools and equipment, with a view to reduce the drudgery of the human beings and draught animals, enhance the cropping intensity, precision and timelines of efficiency of utilisation of various crop imputs.

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