Controls given to one branch of government to limit the power of another branch are known as

Those are known as Checks and Balances. They are used to make sure one branch doesn't become too powerful.

the answer is 250 percent.

crop rotation kepy different plants in the soil instead of once constintly. when switching out plants you have different nutrients being absorbed at different speeds and different roots growing differently therfore the spoil and water flow have to adapt and carry fresh nutrients to carry the constant changes that were going on in the soil.