Farming with Petroleum

Perelman, Michael

doi:10.1080/00139157.1972.9930634

Cited by 35 publications

(14 citation statements)

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“…Industrial energetics budgets the energy which has to be expended by Man in order to carry out the various stages of a food-producing process. Currently, much of this energy derives from fossil fuels (Perelman, 1972). The total input energy may be compared with the nutritionally useful output in the form of energy in food, or with the energy equivalent of protein.…”

Section: Introductionmentioning

confidence: 99%

An Energy Budget for a Rainbow Trout Farm

Pitcher¹

1977

Envir. Conserv.

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An industrial energy-budget for a Rainbow Trout farm shows that 93% of the energy costs of production are incurred in feeding the fish, seven-tenths of which is due to fishnieal incorporated in the food pellets. Only one-tenth of the input energy is converted into fish, but the energy subsidy of the farming operation compares favourably with conventional fishing and is 423 input megajoules per kg of output fish protein (55 MJ per kg wet-weight of fish landed). However, if the Trout could be fed on a diet composed of suitable vegetable protein, this performance would be improved to an overall conversion efficiency of one-third, and a subsidy of about 160 MJ per kg. A smaller but similar improvement could result if the Peruvian anchovy fishery regained its former production level.As these improved energy-costs are comparable with those of crops of potatoes, and with those of bread and milk production, a 2-men Rainbow Trout farm yielding 25 tonnes per year on one hectare would become an attractive protein-producing enterprise in localities where the necessary water-supply is available.

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Section: Introductionmentioning

confidence: 99%

An Energy Budget for a Rainbow Trout Farm

Pitcher¹

1977

Envir. Conserv.

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“…The combination of devegetation and erosion resulted in a rapid decline in soil fertility (Vitousek et al 1979). (Perelman 1972). When soils are plowed and exposed to air there is a simultaneous loss of carbon through decomposition, see Figure 14.11.…”

Section: Undermining the Earth's Soil Resource Basementioning

confidence: 99%

Patterns of Life

Mielke¹

1989

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and the skilled people at Unwin Hyman were steadfast and helpful at every point in the writing and publishing craft. To all the above people my sincerest thanks. I profited from their interest and assistance and the book has been greatly improved and enriched as a result of their efforts and helpful advice. Whatever errors and deficiencies that remain are not theirs, but mine.I wish to dedicate this book to my students who nurtured thinking about patterns of life and to my daughter Beverly Ann who is a constant inspiration and motivates thoughts about now and the future.

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“…Some convey the impression that the present reliance on support energy inputs is undesirable and indicative of bad use of resources, though when attempting a tight summing up more caution is exercised: the emphasis then is often on implications for the future 'if' or 'when' energy becomes scarce or expensive (for example Pimental et al 1973). However, some writers appear to accept that energy considerations themselves show that resources are being used inefficiently at present (for example Perelman 1972, Heichel 1973, Slesser 1973, Tribe et al 1975, Leach 1976.…”

Section: Iiz Some Narrnative Uses Of Energy Datamentioning

confidence: 99%

“…They have said or implied that explicit consideration should be given to energetic eficiency in determining what foods to produce and the choice of inputs with which to produce them (e.g. Perelman 1972, Slesser 1973, Leach 1976. Discussion of energy efficiency in agriculture sometimes reveals an energy fundamentalism, the acceptance of which requires rejection of basic tenets of production economics as well as consumer sovereignty.…”

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confidence: 99%

Energy Budgeting: Joules or Dollars?

Edwards

1976

Australian Journal of Agricultural Economics

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The assumptions which must be made to accept ratios of energy output to energy input 88 an efficiency measure with normative significance are examined and found to be unrealistic. It is considered better for governments to modify market prices where divergences exist between private and social costs or benefits than to use energy ratios, or prices determined by energy considerations, as a criterion in allocating resources. Moreover, in a trading world, energy considerations are often of little u8e in positive analysis o f the relationship between energy prices and the prices, or protitability o f production, o f different foods in a particular country.

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Farming with Petroleum

Cited by 35 publications

References 0 publications

An Energy Budget for a Rainbow Trout Farm

An Energy Budget for a Rainbow Trout Farm

Patterns of Life

Energy Budgeting: Joules or Dollars?

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