| dc.description.abstract | This paper estimates energy consumption per unit floor area of greenhouse and open field for tomato,
chili and lettuce production. Primary data were collected from 530 vegetable farmers during JaneDec,
2010 in West Java, Indonesia. Energy estimates were calculated from actual amount of inputs and outputs
and corresponding conversion factors. Results reveal that the total input energy used in greenhouse
(GH) production of tomato, chili (medium and high land) and lettuce were 47.62, 41.55, 58.84, and
24.54 GJ/ha respectively. Whereas, the requirement of total input energy for open field (OF) production of
tomato, chili (medium and high land) and lettuce were 49.01, 41.04, 57.94 and 23.87 GJ/ha, respectively.
The ratio of output to input energy was higher in greenhouse production (0.85, 0.45 and 0.49) than open
field vegetable production (0.52, 0.175 and 0.186) for tomato, chili medium land and chili highland,
respectively, but outputeinput ratio of lettuce open field production was twice as that of greenhouse
vegetable production. Financial analysis revealed higher mean net returns from greenhouse vegetable
production as 7043 $/ha (922e15,299 $/ha) when compared to 571 $/ha (44e1172 $/ha) from open field
vegetable production. Among the greenhouse vegetables, tomato cultivation was the most profitable in
terms of energy efficiency and financial productivity. | en_US |
