What was “nativism”? i need different examples

Nativism: protecting those who are already inhabiting and existing in an area against newcomers or immagrants

Examples:

Chinese Exclusion Act

Immigration Resctriction League

an ethnic enclave is a geographic area with high ethnic concentration,

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.