How does the press serve as a check on the government

They serve as government watchdogs so they investigate the government and if they discover corruption the will let the people know so they can fix it.

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.