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Table 6

Assessment of the average outputs or contributions, direct and indirect, that a dairy cow gives in Finca del Medio. DOI: https://doi.org/10.1525/elementa.324.t6

Outputs/ContributionsUnit of measureAmount (yearly)Value in CUP

Milk 1,200 5,280
Yearling (a) Unit 1,000
Fertilizers1 Kg 1,095 17,793.75
Biofuel2 (0,5454 daily m3 per cow is equivalent to 3,2724 kWh/day that has a cost of 0,211 USD for Cuba for each one or 5,275 CUP) m3 199.07 6,300.57
Emission reduction of CH43 m3 119,442
Reduction of the increase of the CO24 concentration. m3 76,628
Total   30,374.32
Outputs/ContributionsUnit of measureAmount (yearly)Value in CUP

Milk 1,200 5,280
Yearling (a) Unit 1,000
Fertilizers1 Kg 1,095 17,793.75
Biofuel2 (0,5454 daily m3 per cow is equivalent to 3,2724 kWh/day that has a cost of 0,211 USD for Cuba for each one or 5,275 CUP) m3 199.07 6,300.57
Emission reduction of CH43 m3 119,442
Reduction of the increase of the CO24 concentration. m3 76,628
Total   30,374.32

1 This calculation was based on the effluents of the anaerobic digester. The cow manure deposited at nighttime (15 kg per cow) is collected and mixed with 1 kg of manure: 1.5 of water, to put it inside the anaerobic digester, the anaerobic digestion and the production of biofuel and effluents used for fertigation and the improvement of the soil and crops. (7.5 kg of effluents equal 1 kg of fertilizer (Suárez et al., 2012). QUIMIMPORT pays \$650 USD for one ton of fertilizer 1USD = 1CUC7 = 25.00 CUP.

2 This value is calculated following the daily biofuel production in the Finca del Medio, 6 m3 and 11 cows that, on average, deposit the manure at night time that is then collected the next day to feed the anaerobic digestor.

3 60% of 1 m3 of biofuel is equivalent to methane (Cepero et al., 2012).

4 40% of 1 m3 of biofuel is equivalent to CO2 (Cepero et al., 2012).

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