| Field | Papers | Citations | Citations per paper | World average | % +/– | |
| 1 | Physics | 28,646 | 317,344 | 11.08 | 8.82 | +26 |
| 2 | Agricultural sciences | 12,424 | 98,594 | 7.94 | 6.73 | +18 |
| 3 | Materials science | 11,684 | 82,759 | 7.08 | 6.44 | +10 |
| %3D4 | Chemistry | 46,093 | 534,686 | 11.60 | 10.61 | +9 |
| %3D4 | Engineering | 22,401 | 107,776 | 4.81 | 4.43 | +9 |
| %3D6 | Plant/animal sciences | 22,174 | 173,462 | 7.82 | 7.49 | +4 |
| %3D6 | Space science | 7,397 | 108,558 | 14.68 | 14.10 | +4 |
| %3D8 | Environment/ecology | 10,386 | 109,455 | 10.54 | 10.70 | –1 |
| %3D8 | Mathematics | 11,463 | 37,667 | 3.29 | 3.34 | –1 |
| 10 | Clinical medicine | 56,101 | 688,250 | 12. | 12.63 | –3 |
| 11 | Geosciences | 7,391 | 63,5 | 8.56 | 9.39 | –9 |
| 12 | Pharmacology | 5,061 | 52,170 | 10.31 | 11.80 | –13 |
| 13 | Microbiology | 7,528 | 97,036 | 12.89 | 15.60 | –17 |
| 14 | Molecular biology | 8,096 | 170,304 | 21.04 | 25.63 | –18 |
| 15 | Biochemistry | 16,349 | 226,765 | 13.87 | 17.04 | –19 |
| 16 | Neuroscience | 9,387 | 142,319 | 15.16 | 19.07 | –21 |
| 17 | Immunology | 3,514 | 57,834 | 16.46 | 21.50 | –23 |
| 18 | Computer science | 9,791 | 24,938 | 2.55 | 3.45 | –26 |
| 19 | Economics/business | 4,994 | 20,204 | 4.05 | 5.72 | –29 |
| 20 | Psychiatry/psychology | 6,260 | 36,663 | 5.86 | 10.74 | –45 |
Spain ranks ninth in output, 11th in citations received and 23rd in citations per paper among nations publishing 50,000 or more papers during the period across the science and social science fields surveyed. The table above ranks fields for Spain by relative citation impact, that is, citations per paper in a field compared with world citations per paper score in the same field. Spain’s percentage above or below the world average is presented in the column at the far right. Exceptional areas of strength are physics, agricultural sciences, materials science, chemistry and engineering.
For further information, see: http://scientific.thomsonreuters.com/products/esi
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