Vulnerability of shallow ground water and drinking-water wells to nitrate in the United States: Model of predicted nitrate concentration in shallow, recently recharged ground water -- Input data set for histosols (gwava-s_hist)
This data set represents the amount of histosols soil taxonomic
order, in percent, in the conterminous United States.
		
The data set was used as an input data layer for a national
model to predict nitrate concentration in shallow ground water.
		
Nolan and Hitt (2006) developed two national models to predict …