Table 2 Estimation of non-market benefits

1

Improve soil fertility

Cost saved from the purchase of nitrogen in chemical fertilizer from soybean production in crop rotation

Average quantity of nitrogen fixed multiplied by market price/kg of nitrogen

15:15:15 50 kg-NPK fertilizer contains 15% of N₂

2

Consumption

Quantity of soybean consumed per hectare

Quantity of soybean consumed (kg) multiplied by the market price/kg of soybean

3

Residue

Mean cost of soap saved from the use of soybean residue soap

Mean cost saved per month multiplied by lifespan of soybean residue soap (months)