Why was the Dred Scott case important?

in your own words

Explanation:Douglas that settlers in a U.S. territory could circumvent the U.S. Supreme Court's Dred Scott decision—which held that neither states nor territories were empowered to make slavery illegal—simply by failing to provide for police enforcement of the rights of slave owners to their slaves.

the answer is migration

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.