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MAP Technical Reports Series No. 106 UNEP

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- 34 -<br />

Table 3<br />

Origin of Nitrogen and Phosphorus Loads from<br />

Anthropogenic Sources<br />

% Nitrogen % Phosphorus<br />

Urban Sewage: 20 - 40 40 - 60 - (80)<br />

Agro Industries:<br />

Crop production and<br />

Fertilizer use,<br />

Animal husbandry,<br />

Food transformation 40 - 60 - (80) 20 - 40<br />

Others:<br />

Industries,<br />

Urban runoff,<br />

Atmospheric<br />

Precipitation 10 - 20

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