What is one reason that andrew jackson issued the specie circular in july 1836, requiring payment in gold or silver for all public lands?

One of the Important reasons for the 1836 Specie Circular was the uncontrolled land speculation in the West. Real estate speculation was funded by increased availability of credit from the Second Bank of the United States and new, reckless frontier banks. State banks were chartered for the express purpose of extending credit to speculators. The number of banks more than doubled between 1812 and 1819. The Banks were unregulated and began to issue massive amounts of bank notes. The bank notes were not backed by gold and silver. This led to the Panic of 1819.

They made a checks and balance system to equal power within the branches. the "check" meant that one branch would watch one branch and "balance" them if they were too powerful. if you want more info on this, i would just google checks and balance system.