Plzz ! 30pt what was the difference between the first wave of immgrants to the united states and the second wave that began in the late nineteenth century?

The first wave included mostly wealthy people, while later ones were poor. Early immigrants came in larger ships, while later groups arrived in fleets of smaller ships.

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.