Just learning AOG:
To get the outer boundary into Climate Fieldview, go into
Documents > AgOpenGPS > Fields
Zip the folder of the field you would like.
Upload your file:
After it is finished importing, it will give two identical files in your inbox. (I think one is coming from the kml file and one is coming from the ISOXML file. It works to zip one of those files instead of the entire folder.)
Use one and discard the other.
I was unable to import inner boundaries, such as waterways.
If wanting a shp file,
seems like a good choice to make a shp file from the ISOXML . Still was only successful at doing outer boundaries.