Group Exercise II:

A) Source apportionment of total N and total P in a catchment (use data from SA spreadsheet given to you).

Use the data in excel sheet to answer and illustrate the following questions:

1. Conduct a source apportionment for net total N loadings and net total P loadings in the catchment and show the outcome as two graphs with percentage contribution from all sources for each year?
2. Calculate the gross total N and total P losses from agricultural land in the catchment? Show the annual results as kg/ha in two graphs.

Discuss and explain the results observed.

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