The calculations are based on the following production targets:
Polyculture with fertilization and feeding: 5 t fish/ha/year
Polyculture in combination with pigs: 7 t fish/ha/year plus 5 t pigs/ha/year
Polyculture in combination with ducks: 2.5 t fish plus 1.5 t ducks/ha/year
| Total area: 11.5 ha of ponds of which: | ||||
| - | 3 ha polyculture in combination with pigs (100 pigs/ha) | |||
| - | 1.5 ha polyculture in combination with ducks (500 ducks/ha) | |||
| - | 7 ha polyculture with feeding and fertilizing | |||
| Zam.K. | ||||
| (i) | Income and production: | |||
| - | Fish: 59 700 kg × Zam.K. 1.20/kg = Zam.K. 71 640 | |||
| - | Pigs: 15 000 kg × Zam.K. 2.00/kg = Zam.K. 30 000 | |||
| - | Ducks: 3 250 kg × Zam.K. 1.50/kg = Zam.K. 4 875 | |||
| Total income | 106 515 | |||
| (ii) | Costs2 | |||
| 1. | Total construction costs (Zam.K. 193 000) depreciated over 30 years (Zam.K. 6 433) plus 10% interest (Zam.K. 643) | 7 076 | ||
| 2. | Transport: Zam.K. 330/ha/year × 11.5 ha | 3 800 | ||
| 3. | Fuel: Zam.K. 80/ha/year × 11.5 ha | 920 | ||
| 4. | Maintenance: Tools and material - Zam.K. 50/ha/year × 11.5 ha | 575 | ||
| 5. | Cost of stocking: 300 kg fingerlings/ha × Zam.K. 1.00 × 11.5 ha | 3 450 | ||
| 6. | Pigs: 100 pigs of 10 kg/ha = 1 000 kg × Zam.K. 1.50 × 3 ha | 4 500 | ||
| 7. | Ducks: 500 ducklings/ha = 125 kg × Zam.K. 1.00/kg × 1.5 ha | 188 | ||
| 8. | Organic fertilizing: 15 t/ha/year × Zam.K. 151/t × 7 ha | 15 855 | ||
| 9. | Feed: | - fishfeed: 20 t/ha/year × Zam.K. 01.0 × 7 ha | 14 000 | |
| - pigfeed: 35 t/ha/year × Zam.K. 0.15 × 3 ha | 15 750 | |||
| - duckfeed: 7.5 t/ha/year × Zam.K. 0.10/kg × 1.5 ha | 1 125 | |||
| 10. | Labour: | Farm Manager: Zam.K. 200/month × 12 | 2 400 | |
| 20 labourers × Zam.K. 420/man/year | 8 400 | |||
| Total cost | 78 039 | |||
| (iii) | Net profit | 28 476 | ||
| (iv) | Average rate of return: 36.5% | |||
| Total area: 6 ha of ponds of which: | ||||
| - | 3 ha polyculture in combination with pigs | |||
| - | 1 ha polyculture in combination with ducks | |||
| - | 2 ha polyculture with feeding and fertilizing | |||
| (i) | Income and production: | |||
| - Fish: 33 500 kg × Zam.K. 1.20/kg = Zam.K. 40 200 | ||||
| - Pigs: 15 000 kg × Zam.K. 2.00/kg = Zam.K. 30 000 | ||||
| - Ducks: 1 500 kg × Zam.K. 1.50/kg = Zam.K. 2 250 | ||||
| Total income | 72 450 | |||
| (ii) | Costs2 | |||
| 1. | Total construction costs (Zam.K. 73 080) depreciated over 30 years (Zam.K. 2 436) plus 10% interest (Zam.K. 244) | 2 680 | ||
| 2. | Transport: Zam.K. 330/ha/year × 6 ha | 1 980 | ||
| 3. | Fuel: Zam.K. 80/ha/year × 6 ha | 480 | ||
| 4. | Maintenance: Zam.K. 50/ha/year × 6 ha | 300 | ||
| 5. | Cost of stocking: 300 kg fingerlings/ha × Zam.K. 1.00/ha × 6 ha | 1 800 | ||
| 6. | Pigs: 100 pigs of 10 kg/ha = 1 000 kg × Zam.K. 1.50/kg × 3 ha | 4 500 | ||
| 7. | Ducks: 500 ducklings/ha = 125 kg × Zam.K. 1.00/kg × 1 ha | 125 | ||
| 8. | Organic fertilizing: 25 t/ha/year × Zam.K. 151/t × 2 ha | 5 000 | ||
| 9. | Feed: | - fishfeed: 25 t/ha/year × Zam.K. 0.10/kg × 2 ha | 5 000 | |
| - pigfeed: 35 t/ha/year × Zam.K. 0.20/kg × 3 ha | 21 000 | |||
| - duckfeed: 7.5 t/ha/year × Zam.K. 0.10 × 1 ha | 750 | |||
| 10. | Labour: | Farm Manager: Zam.K. 200/month × 12 | 2 400 | |
| 10 labourers × Zam.K. 420/man/year | 4 200 | |||
| Total cost | 50 215 | |||
| (iii) | Net profit | 22 235 | ||
| (iv) | Average rate of return: 44.27% | |||
| Total area: 12 ha of ponds of which: | ||||
| - | 3 ha polyculture in combination with pigs | |||
| - | 2 ha polyculture in combination with ducks | |||
| - | 7 ha polyculture, with feeding and fertilizing | |||
| (i) | Income and production | |||
| - Fish: 61 000 kg × Zam.K. 1.20/kg = Zam.K. 73 200 | ||||
| - Pigs: 15 000 kg × Zam.K. 2.00/kg = Zam.K. 30 000 | ||||
| - Ducks: 3 000 kg × Zam.K. 1.50/kg = Zam.K. 4 500 | ||||
| Total income | 107 700 | |||
| Zam. K. | ||||
| (ii) | Costs2 | |||
| 1. | Total construction costs (Zam.K. 151 000) depreciated over 30 years (Zam.K. 5 033) plus 10% interest (Zam.K. 503) | 5 536 | ||
| 2. | Transport: Zam.K. 330/ha/year × 12 ha | 3 960 | ||
| 3. | Fuel: Zam.K. 80/ha/year × 12 ha | 960 | ||
| 4. | Maintenance: Zam.K. 50/ha/year × 72 ha | 600 | ||
| 5. | Cost of stocking: 300 kg fingerlings/ha × Zam.K. 1.00 × 72 ha | 3 600 | ||
| 6. | Pigs: 100 pigs of 10 kg/ha = 1 000 kg × Zam.K. 1.50/kg × 3 ha | 4 500 | ||
| 7. | Ducks: 500 ducklings/ha = 125 kg × Zam.K. 1.00/kg × 2 ha | 250 | ||
| 8. | Organic fertilizing: 15 t/ha/year × Zam.K. 151/t × 7 ha | 15 855 | ||
| 9. | Feed: | Fishfeed: 20 t/ha/year × Zam.K. 0.10/kg × 7 ha | 14 000 | |
| Pigfeed: 35 t/ha/year × Zam.K. 0.20/kg × 3 ha | 21 000 | |||
| Duckfeed: 7.5 t/ha/year × Zam.K. 0.10/kg × 2 ha | 1 500 | |||
| 10. | Labour: | Farm Manager: Zam.K. 200/month × 12 | 2 400 | |
| 22 labourers × Zam.K. 420/man/year | 9 240 | |||
| Total cost | 83 401 | |||
| (iii) | Net profit | 24 299 | ||
| (iv) | Average rate of return: 29.1% | |||
| Total area: 10 ha of ponds of which: | ||||
| - | 3 ha polyculture in combination with pigs | |||
| - | 3 ha polyculture in combination with ducks | |||
| - | 4 ha polyculture, with feeding and fertilizing | |||
| (i) | Income and production | |||
| - Fish: 48 500 kg × Zam.K. 1.20/kg = Zam.K. 58 200 | ||||
| - Pigs: 15 000 kg × Zam.K. 2.00/kg = Zam.K. 30 000 | ||||
| - Ducks: 4 500 kg × Zam.K. 1.50/kg = Zam.K. 6 750 | ||||
| Total income | 94 950 | |||
| (ii) | Costs2 | |||
| 1. | Total construction costs (Zam.K. 104 500) depreciated over 30 years (Zam.K. 3 483) plus 10% interest (Zam.K. 348) | 3 831 | ||
| 2. | Transport: Zam.K. 330/ha/year × 10 ha | 3 300 | ||
| 3. | Fuel: Zam.K. 80/ha/year × 10 ha | 800 | ||
| 4. | Maintenance: Zam.K. 50/ha/year × 6 ha | 500 | ||
| 5. | Cost of stocking: 300 kg fingerlings/ha × Zam.K. 1.00/kg × 10 ha | 3 000 | ||
| 6. | Pigs: 100 pigs of 10 kg/ha = 1 000 kg × Zam.K. 1.50/kg × 3 ha | 4 500 | ||
| 7. | Ducks: 500 ducklings/ha = 125 kg × Zam.K. 1.00/kg × 3 ha | 375 | ||
| 8. | Organic fertilizing: 25 t/ha/year × Zam.K. 151/t × 4 ha | 15 100 | ||
| 9. | Feed: | Fishfeed: 20 t/ha/year × Zam.K. 0.10/kg × 4 ha | 8 000 | |
| Pigfeed: 35 t/ha/year × Zam.K. 0.15 × 3 ha | 15 750 | |||
| Duckfeed: 7.5 t/ha/year × Zam.K. 0.10/kg × 3 ha | 2 250 | |||
| 10. | Labour: | Farm Manager: Zam.K. 200/month × 12 | 2 400 | |
| 17 labourers × Zam.K. 420/man/year | 7 140 | |||
| Total cost | 66 946 | |||
| (iii) | Net profit | 28 004 | ||
| (iv) | Average rate of return: 41.8% | |||
| Shishamba | Mwekera | Chipata | Lundazi | Total | |||||||
| kg | Zam.K. | kg | Zam.K. | kg | Zam.K. | kg | Zam.K. | kg | Zam.K. | ||
| 1. | Initial investment1 | 193 000 | 73 080 | 151 000 | 104 500 | 521 580 | |||||
| 2. | Production of fish2 | 59 700 | 71 640 | 33 500 | 40 200 | 61 000 | 73 200 | 48 500 | 58 200 | 202 700 | 243 240 |
| 3. | Production of pigs2 | 15 000 | 30 000 | 15 000 | 30 000 | 15 000 | 30 000 | 15 000 | 30 000 | 60 000 | 120 000 |
| 4. | Production of ducks2 | 3 250 | 4 875 | 1 500 | 2 250 | 3 000 | 4 500 | 4 500 | 6 750 | 12 250 | 18 375 |
| 5. | Total income2 | 106 515 | 72 450 | 107 700 | 94 950 | 381 615 | |||||
| 6. | Total costs2 3 5 | 78 039 | 50 215 | 83 401 | 66 946 | 278 601 | |||||
| 7. | Net profit2 | 28 476 | 22 235 | 24 299 | 28 004 | 103 014 | |||||
| 8. | Average rate of return | 36.5% | 44.3% | 29.1% | 41.8% | 37% | |||||
| 9. | Average return on investment2 | 14.7% | 30.0% | 16.1% | 26.7% | 19.7% | |||||
| 10. | Employment4 | 20 | 10 | 22 | 17 | 69 | |||||
3 Including depreciation of initial investment over 30 years plus 10% interest
4 Number of labourers permanently employed
5 Excluding interest on initial investment
