On Energy and Agriculture: From Hunting-Gathering to Landless Farming

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http://eprints.org/relation/isVersionOf https://pure.iiasa.ac.at/id/document/1047 http://eprints.org/relation/isVolatileVersionOf https://pure.iiasa.ac.at/id/document/1047 http://eprints.org/relation/isCoversheetVersionOf https://pure.iiasa.ac.at/id/document/1047 archive 351 disk0/00/00/10/27 2016-01-15 01:45:52 2021-08-27 17:09:10 2016-01-15 01:45:52 monograph show 2 Marchetti C. 1619 On Energy and Agriculture: From Hunting-Gathering to Landless Farming pub iis_fag iis_ene prog_enp An energy analysis of agricultural practices shows very coherent patterns of evolution from the Neolithic Age up to this century. All technical advances were in fact exploited toward intensification, and the ratio of food output to energy input was held remarkably constant over such a long stretch of time. New agricultural practices in developed countries linked to massive energy "subsidies" from fossil fuels have disrupted the trend, substantially altering the ratio. A more rational use of energy in agriculture is going to be necessary when the developing countries adopt these practices. Low-tillage techniques, hormonal and genetic pesticides and herbicides, nitrogen fixing in grains, and other emerging technologies satisfying this contstraint are briefly described and assessed in this paper. 1979-12 published RR-79-010 RR-79-010 10 195 public research_report IIASA, Laxenburg, Austria 18 TRUE FALSE info:eu-repo/semantics/book