Using the lagoon cost figure in Table 2-8 and the effectiveness estimates in Table
2-4, we can now estimate the cost-effectiveness of lagoon cost-sharing relative to
nutrient losses from excess application of wastes. This process is complicated by
the fact that we have measured the effectiveness of lagoons in terms of nutrient
hectare of land application while we have measured lagoon costs in
dollars per cubic foot of lagoon. is therefore necessary to convert the cost
figures to be based on equivalent area of land application. The following equation
was used to convert the cost figures:
number of
lagoon
hectare
hectare
of lagoon
number
As would be expected, the parameters in the above equation are different for
swine and poultry. Table 2-9 summarizes these figures and the per- hectare cost
results for lagoons. Calculation details are presented in Appendix 6.
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