Of the unproductive areas, 0.1% is unproductive standing water (ponds or lakes), 0.9% is unproductive flowing water (rivers), 39.3% is too rocky for vegetation, and 21.4% is other unproductive land.
Unproductive areas make up 0.1% as standing water (ponds or lakes), 0.9% as flowing water (rivers), 39.3% as being too rocky for vegetation, and 21.4% as other unproductive land.