How did medieval farmers deal with the problem of soil exhaustion

Me 1. identify countries 2 and 3 shown above. a) australia and samoa b) samoa and vanutu c) micronesia and samoa d) new zealand and new guinea

The first national government for the united states was

Are people more motivated to change from positive or negative experiences, like slavery, womens rights, and any other historical movements/moments? i need more factual information than opinions.