Agovernment in which powers are divided between a national government and state governments with the national government being supreme is called a. a confederate government. b. a republican government. c. a unitary government. d. a federal government

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.

entering that problem on the tube you may come up with an answer