Table II
Mean emergence date (MED) of topics in articles from the journal Agronomy for Sustainable Development. Topics were searched in all article text, and thus do not necessarily reflect the article topic. Topics that showed highest hits in 2009 are printed in bold. Hits in percent refer to the number of articles containing topics measured using the journal website search engine on October 22–23, 2009, versus total yearly published articles. Mean emergence date was calculated as the average of years weighed by hits: ∑(Hits.year)/∑Hits, thus allowing to sort topics by order of emergence in the journal. Most recent topics have thus most recent date (see Fig. 1). For queries having several words, e.g. genetically modified, we used double quotes operators (“...”) to retrieve only answers from words appearing together. AD: Anno Domini.
| TOPICS | MED | 2009 | 2008 | 2007 | 2006 | 2005 | 2004 | 2003 | 2002 | 2001 | 2000 | 1999 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| AD | % | % | % | % | % | % | % | % | % | % | % | |
| Biofuels | 2008.29 | 5.48 | 3.39 | 2.27 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Genetically modified | 2008.25 | 5.48 | 5.08 | 2.27 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Conservation agriculture | 2007.54 | 13.70 | 1.69 | 0 | 9.09 | 0 | 1.92 | 0 | 0 | 0 | 0 | 0 |
| Urban agriculture | 2007.22 | 2.74 | 1.69 | 0 | 0 | 0 | 1.92 | 0 | 0 | 0 | 0 | 0 |
| Sociology | 2007.11 | 10.96 | 0 | 2.27 | 0 | 1.59 | 3.85 | 1.27 | 0 | 0 | 0 | 0 |
| Organic farming | 2007.05 | 38.36 | 20.34 | 22.73 | 9.09 | 7.94 | 0 | 3.80 | 5.13 | 1.43 | 2.50 | 0 |
| Carbon sequestration | 2006.92 | 16.44 | 11.86 | 6.82 | 9.09 | 4.76 | 3.85 | 0 | 3.85 | 0 | 0 | 0 |
| Phytoremediation | 2006.87 | 1.37 | 6.78 | 2.27 | 0 | 3.17 | 0 | 1.27 | 0 | 0 | 0 | 0 |
| Mulch | 2006.62 | 21.92 | 28.81 | 15.91 | 15.15 | 3.17 | 9.62 | 1.27 | 5.13 | 1.43 | 1.25 | 1.79 |
| Biodiversity | 2006.55 | 54.79 | 25.42 | 25 | 12.12 | 12.7 | 7.69 | 5.06 | 6.41 | 5.71 | 2.50 | 5.36 |
| Climate change | 2006.54 | 31.51 | 18.64 | 9.09 | 9.09 | 6.35 | 9.62 | 2.53 | 5.13 | 2.86 | 1.25 | 1.79 |
| Integrated pest management | 2006.50 | 9.59 | 10.17 | 11.36 | 6.06 | 4.76 | 0 | 3.8 | 0 | 1.43 | 0 | 1.79 |
| Allelopathy | 2006.41 | 5.48 | 6.78 | 4.55 | 3.03 | 1.59 | 0 | 2.53 | 0 | 2.86 | 0 | 0 |
| Soil erosion | 2006.19 | 21.92 | 16.95 | 20.45 | 15.15 | 6.35 | 9.62 | 1.27 | 7.69 | 0 | 2.50 | 3.57 |
| Crop rotation | 2006.17 | 49.32 | 30.51 | 31.82 | 18.18 | 12.70 | 11.54 | 6.33 | 12.82 | 10 | 2.50 | 5.36 |
| Transgenic | 2006.15 | 13.70 | 13.56 | 13.64 | 0 | 4.76 | 1.92 | 6.33 | 0 | 0 | 1.25 | 5.36 |
| Grass strips | 2005.92 | 5.48 | 3.39 | 2.27 | 6.06 | 1.59 | 1.92 | 0 | 0 | 1.43 | 2.50 | 0 |
| Biocontrol | 2005.87 | 5.48 | 8.47 | 4.55 | 12.12 | 3.17 | 3.85 | 6.33 | 0 | 2.86 | 0 | 0 |
| Cover crops | 2005.76 | 17.81 | 16.95 | 15.91 | 6.06 | 9.52 | 7.69 | 3.80 | 14.1 | 2.86 | 1.25 | 1.79 |
| Biological control | 2005.70 | 10.96 | 10.17 | 18.18 | 12.12 | 7.94 | 7.69 | 7.59 | 0 | 7.14 | 2.50 | 0 |
| No tillage | 2005.59 | 42.47 | 35.59 | 34.09 | 18.18 | 20.63 | 28.85 | 18.99 | 20.51 | 5.71 | 3.75 | 8.93 |
| Weed control | 2005.35 | 27.40 | 27.12 | 18.18 | 24.24 | 20.63 | 19.23 | 13.92 | 8.97 | 14.29 | 2.50 | 7.14 |
| Intercropping | 2005.34 | 16.44 | 13.56 | 18.18 | 9.09 | 4.76 | 5.77 | 3.80 | 8.97 | 4.29 | 3.75 | 7.14 |
| Irrigation | 2005.21 | 39.73 | 42.37 | 43.18 | 39.39 | 39.68 | 51.92 | 37.97 | 32.05 | 28.57 | 0 | 0 |
| Biological nitrogen fixation | 2005.00 | 6.85 | 6.78 | 11.36 | 0 | 0 | 1.92 | 3.80 | 1.28 | 14.29 | 0 | 0 |
| Agroforestry | 2004.88 | 10.96 | 6.78 | 6.82 | 3.03 | 1.59 | 1.92 | 0 | 3.85 | 2.86 | 3.75 | 7.14 |
| Decision support systems | 2004.74 | 8.22 | 8.47 | 6.82 | 3.03 | 0 | 13.46 | 3.80 | 6.41 | 5.71 | 1.25 | 3.57 |
| Precision agriculture | 2004.06 | 4.11 | 3.39 | 2.27 | 0 | 1.59 | 9.62 | 1.27 | 6.41 | 2.86 | 0 | 3.57 |
| Drought stress | 2004.01 | 12.33 | 5.08 | 13.64 | 0 | 6.35 | 11.54 | 10.13 | 7.69 | 10 | 2.5 | 12.5 |