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dc.contributor.author
Pellegrini, Pedro  
dc.contributor.author
Fernandez Alduncin, Roberto Javier  
dc.date.available
2020-01-29T21:13:37Z  
dc.date.issued
2018-03  
dc.identifier.citation
Pellegrini, Pedro; Fernandez Alduncin, Roberto Javier; Crop intensification, land use, and on-farm energy-use efficiency during the worldwide spread of the green revolution; National Academy of Sciences; Proceedings of the National Academy of Sciences of The United States of America; 115; 3-2018; 2335-2340  
dc.identifier.issn
0027-8424  
dc.identifier.uri
http://hdl.handle.net/11336/96185  
dc.description.abstract
We analyzed crop production, physical inputs, and land use at the country level to assess technological changes behind the threefold increase in global crop production from 1961 to 2014. We translated machinery, fuel, and fertilizer to embedded energy units that, when summed up, provided a measure of agricultural intensification (human subsidy per hectare) for crops in the 58 countries responsible for 95% of global production. Worldwide,there was a 137% increase in input use per hectare, reaching 13 EJ, or 2.6% of the world´s primary energy supply, versus only a 10% increase in land use. Intensification was marked in Asia and Latin America, where input-use levels reached those that North America and Europe had in the earlier years of the period; the increase was more accentuated, irrespective of continent, for the 12 countries with mostly irrigated production. Half of the countries (28/58), mainly developed ones, had an average subsidy >5 GJ/ha/y (with fertilizers accounting for 27% in 1961 and 45% in 2014), with most of them (23/28) using about the same area or less than in 1961 (net land sparing of 31 Mha). Most of the remaining countries (24/30 with inputs <5 GJ/ha/y), mainly developing ones, increased their cropped area (net land extensification of 135 Mha). Overall, energy-use efficiency (cropoutput/inputs) followed a U-shaped trajectory starting at about 3 and finishing close to 4. The prospects of a more sustainable intensification are discussed, and the inadequacy of the land-sparing model expectation of protecting wilderness via intensified agriculture is highlighted.  
dc.format
application/pdf  
dc.language.iso
eng  
dc.publisher
National Academy of Sciences  
dc.rights
info:eu-repo/semantics/openAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/  
dc.subject
EROI  
dc.subject
Jevons Paradox  
dc.subject
Land Sharing  
dc.subject
Land Sparing  
dc.subject
water-energy-food security nexus  
dc.subject.classification
Otras Ciencias de la Tierra y relacionadas con el Medio Ambiente  
dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente  
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS  
dc.title
Crop intensification, land use, and on-farm energy-use efficiency during the worldwide spread of the green revolution  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2019-10-23T21:12:46Z  
dc.journal.volume
115  
dc.journal.pagination
2335-2340  
dc.journal.pais
Estados Unidos  
dc.journal.ciudad
Washington DC, USA  
dc.description.fil
Fil: Pellegrini, Pedro. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura. Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura; Argentina  
dc.description.fil
Fil: Fernandez Alduncin, Roberto Javier. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura. Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura; Argentina  
dc.journal.title
Proceedings of the National Academy of Sciences of The United States of America  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.pnas.org/content/115/10/2335.long  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5877987/  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.1073/pnas.1717072115