Nonpoint and point sources of nutrients
Quantifying nutrient outputs
Concentrations of nutrients in streams vary with land use
Comparisons of nonpoint and point source inputs to nutrient yields
For more information
Figure 1. Estimated basin inputs of total nitrogen and total phosphorus and the proportions of inputs from wastewater, atmospheric deposition, and the balance of agricultural inputs.
Figure 2. Estimated stream yields of total nitrogen and total phosphorus and the proportion of stream yield contributed by point sources and nonpoint sources.
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