Table 6.
The top 20 keywords with strong citation bursts.
| Keywords | Strength | TA | Timespan and Duration | |||||
|---|---|---|---|---|---|---|---|---|
| 91–97 | 98–03 | 04–09 | 10–15 | Begin | End | |||
| China | 33.6163 | 141 | 0 | 0 | 0 | 141 | 2012 | 2015 |
| Swat | 16.708 | 188 | 0 | 0 | 0 | 188 | 2010 | 2015 |
| groundwater | 13.33 | 115 | 46 | 69 | 0 | 0 | 1995 | 1998 |
| herbicide | 13.0964 | 45 | 20 | 25 | 0 | 0 | 1991 | 2002 |
| climate change | 12.4529 | 80 | 0 | 0 | 0 | 80 | 2012 | 2015 |
| geographic information system | 11.8818 | 109 | 38 | 71 | 0 | 0 | 1992 | 2000 |
| impact | 10.5447 | 156 | 0 | 0 | 0 | 156 | 2013 | 2015 |
| atrazine | 10.269 | 56 | 20 | 17 | 6 | 13 | 1991 | 2001 |
| erosion | 9.7417 | 60 | 25 | 35 | 0 | 0 | 1992 | 1999 |
| watershed management | 8.9929 | 111 | 0 | 51 | 60 | 0 | 2001 | 2004 |
| pesticide | 8.9333 | 127 | 25 | 57 | 45 | 0 | 1996 | 2004 |
| discriminant analysis | 8.6377 | 27 | 0 | 14 | 13 | 0 | 2002 | 2007 |
| Midwestern united states | 7.7492 | 16 | 12 | 4 | 0 | 0 | 1994 | 2001 |
| lake | 7.4057 | 59 | 16 | 43 | 0 | 0 | 1997 | 2001 |
| area | 6.9597 | 72 | 0 | 0 | 0 | 72 | 2013 | 2015 |
| corn | 6.2069 | 16 | 10 | 6 | 0 | 0 | 1991 | 2001 |
| nonpoint source | 5.9653 | 49 | 49 | 0 | 0 | 0 | 1993 | 1994 |
| movement | 5.8849 | 13 | 9 | 4 | 0 | 0 | 1992 | 1999 |
| AGNP | 5.5197 | 32 | 7 | 19 | 6 | 0 | 1997 | 2006 |
| galaxy | 5.1373 | 12 | 8 | 4 | 0 | 0 | 1993 | 1998 |
NA: number of articles.