Mapping agricultural land usage in the US from census data

Where do we grow things? This is an important question that can be answered in a few ways, but a more direct way is to just ask growers. This is what they did at a national scale in the 2017 United States’ Agriculture Census and here I am going to use R to load it, filter it, and plot the result. To start we need to download the data and the shape file of the USA counties (or states).