This monarch reigned longer than any other major european leader, and he created the legal code of his country?

The monarch that reigned longer than any other major european leader and that created the legal code for his country was Louis XIV.  He was a precursor of the modernization of France's legal system. He ruled France from 1643 thru 1715 during the absolute monarchy most brilliant time known as centralized absolutism.

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.

might be agreeing to participate ethically with other european nations in the slave trade

or notifying other european nations when taking possession   of african territories