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Seed Science Research

The set of journals have been ranked according to their SJR and divided into four equal groups, four quartiles. Q1 (green) comprises the quarter of the journals with the highest values, Q2 (yellow) the second highest values, Q3 (orange) the third highest values and Q4 (red) the lowest values.

Category Year Quartile
Plant Science 1999 Q2
Plant Science 2000 Q1
Plant Science 2001 Q2
Plant Science 2002 Q3
Plant Science 2003 Q2
Plant Science 2004 Q2
Plant Science 2005 Q1
Plant Science 2006 Q1
Plant Science 2007 Q1
Plant Science 2008 Q1
Plant Science 2009 Q1
Plant Science 2010 Q2
Plant Science 2011 Q2
Plant Science 2012 Q2
Plant Science 2013 Q1
Plant Science 2014 Q2
Plant Science 2015 Q1
Plant Science 2016 Q1
Plant Science 2017 Q1
Plant Science 2018 Q1
Plant Science 2019 Q2

The SJR is a size-independent prestige indicator that ranks journals by their ‘average prestige per article’. It is based on the idea that ‘all citations are not created equal’. SJR is a measure of scientific influence of journals that accounts for both the number of citations received by a journal and the importance or prestige of the journals where such citations come from It measures the scientific influence of the average article in a journal, it expresses how central to the global scientific discussion an average article of the journal is.

Year SJR
1999 0.631
2000 1.100
2001 0.662
2002 0.357
2003 0.575
2004 0.565
2005 0.758
2006 1.131
2007 1.168
2008 0.841
2009 0.884
2010 0.562
2011 0.529
2012 0.784
2013 1.102
2014 0.760
2015 0.755
2016 0.818
2017 0.950
2018 0.746
2019 0.706

This indicator counts the number of citations received by documents from a journal and divides them by the total number of documents published in that journal. The chart shows the evolution of the average number of times documents published in a journal in the past two, three and four years have been cited in the current year. The two years line is equivalent to journal impact factor ™ (Thomson Reuters) metric.

Cites per document Year Value
Cites / Doc. (4 years) 1999 1.134
Cites / Doc. (4 years) 2000 1.975
Cites / Doc. (4 years) 2001 1.489
Cites / Doc. (4 years) 2002 1.276
Cites / Doc. (4 years) 2003 1.511
Cites / Doc. (4 years) 2004 1.523
Cites / Doc. (4 years) 2005 1.992
Cites / Doc. (4 years) 2006 2.087
Cites / Doc. (4 years) 2007 2.729
Cites / Doc. (4 years) 2008 2.410
Cites / Doc. (4 years) 2009 2.143
Cites / Doc. (4 years) 2010 1.570
Cites / Doc. (4 years) 2011 1.510
Cites / Doc. (4 years) 2012 1.933
Cites / Doc. (4 years) 2013 2.421
Cites / Doc. (4 years) 2014 2.496
Cites / Doc. (4 years) 2015 2.146
Cites / Doc. (4 years) 2016 2.106
Cites / Doc. (4 years) 2017 1.977
Cites / Doc. (4 years) 2018 2.045
Cites / Doc. (4 years) 2019 2.116
Cites / Doc. (3 years) 1999 1.134
Cites / Doc. (3 years) 2000 2.007
Cites / Doc. (3 years) 2001 1.294
Cites / Doc. (3 years) 2002 1.036
Cites / Doc. (3 years) 2003 1.308
Cites / Doc. (3 years) 2004 1.373
Cites / Doc. (3 years) 2005 1.901
Cites / Doc. (3 years) 2006 2.214
Cites / Doc. (3 years) 2007 2.714
Cites / Doc. (3 years) 2008 1.863
Cites / Doc. (3 years) 2009 1.892
Cites / Doc. (3 years) 2010 1.312
Cites / Doc. (3 years) 2011 1.507
Cites / Doc. (3 years) 2012 1.938
Cites / Doc. (3 years) 2013 2.639
Cites / Doc. (3 years) 2014 2.330
Cites / Doc. (3 years) 2015 1.953
Cites / Doc. (3 years) 2016 1.794
Cites / Doc. (3 years) 2017 2.058
Cites / Doc. (3 years) 2018 1.979
Cites / Doc. (3 years) 2019 1.854
Cites / Doc. (2 years) 1999 1.077
Cites / Doc. (2 years) 2000 1.798
Cites / Doc. (2 years) 2001 1.088
Cites / Doc. (2 years) 2002 0.963
Cites / Doc. (2 years) 2003 1.291
Cites / Doc. (2 years) 2004 1.135
Cites / Doc. (2 years) 2005 2.045
Cites / Doc. (2 years) 2006 2.133
Cites / Doc. (2 years) 2007 2.197
Cites / Doc. (2 years) 2008 1.458
Cites / Doc. (2 years) 2009 1.547
Cites / Doc. (2 years) 2010 1.229
Cites / Doc. (2 years) 2011 1.235
Cites / Doc. (2 years) 2012 2.158
Cites / Doc. (2 years) 2013 2.343
Cites / Doc. (2 years) 2014 2.086
Cites / Doc. (2 years) 2015 1.343
Cites / Doc. (2 years) 2016 1.903
Cites / Doc. (2 years) 2017 2.000
Cites / Doc. (2 years) 2018 1.581
Cites / Doc. (2 years) 2019 1.778

Evolution of the total number of citations and journal’s self-citations received by a journal’s published documents during the three previous years.
Journal Self-citation is defined as the number of citation from a journal citing article to articles published by the same journal.

Cites Year Value
Self Cites 1999 27
Self Cites 2000 63
Self Cites 2001 36
Self Cites 2002 5
Self Cites 2003 22
Self Cites 2004 33
Self Cites 2005 37
Self Cites 2006 30
Self Cites 2007 33
Self Cites 2008 12
Self Cites 2009 26
Self Cites 2010 11
Self Cites 2011 13
Self Cites 2012 14
Self Cites 2013 21
Self Cites 2014 24
Self Cites 2015 24
Self Cites 2016 14
Self Cites 2017 29
Self Cites 2018 25
Self Cites 2019 19
Total Cites 1999 144
Total Cites 2000 271
Total Cites 2001 185
Total Cites 2002 115
Total Cites 2003 136
Total Cites 2004 114
Total Cites 2005 173
Total Cites 2006 228
Total Cites 2007 285
Total Cites 2008 177
Total Cites 2009 157
Total Cites 2010 101
Total Cites 2011 113
Total Cites 2012 157
Total Cites 2013 256
Total Cites 2014 233
Total Cites 2015 209
Total Cites 2016 183
Total Cites 2017 212
Total Cites 2018 192
Total Cites 2019 191

Evolution of the number of total citation per document and external citation per document (i.e. journal self-citations removed) received by a journal’s published documents during the three previous years. External citations are calculated by subtracting the number of self-citations from the total number of citations received by the journal’s documents.

Cites Year Value
External Cites per document 1999 0.921
External Cites per document 2000 1.541
External Cites per document 2001 1.042
External Cites per document 2002 0.991
External Cites per document 2003 1.096
External Cites per document 2004 0.976
External Cites per document 2005 1.495
External Cites per document 2006 1.922
External Cites per document 2007 2.400
External Cites per document 2008 1.737
External Cites per document 2009 1.578
External Cites per document 2010 1.169
External Cites per document 2011 1.333
External Cites per document 2012 1.765
External Cites per document 2013 2.423
External Cites per document 2014 2.090
External Cites per document 2015 1.729
External Cites per document 2016 1.657
External Cites per document 2017 1.777
External Cites per document 2018 1.722
External Cites per document 2019 1.670
Cites per document 1999 1.134
Cites per document 2000 2.007
Cites per document 2001 1.294
Cites per document 2002 1.036
Cites per document 2003 1.308
Cites per document 2004 1.373
Cites per document 2005 1.901
Cites per document 2006 2.214
Cites per document 2007 2.714
Cites per document 2008 1.863
Cites per document 2009 1.892
Cites per document 2010 1.312
Cites per document 2011 1.507
Cites per document 2012 1.938
Cites per document 2013 2.639
Cites per document 2014 2.330
Cites per document 2015 1.953
Cites per document 2016 1.794
Cites per document 2017 2.058
Cites per document 2018 1.979
Cites per document 2019 1.854

International Collaboration accounts for the articles that have been produced by researchers from several countries. The chart shows the ratio of a journal’s documents signed by researchers from more than one country; that is including more than one country address.

Year International Collaboration
1999 31.25
2000 25.49
2001 38.24
2002 16.00
2003 24.14
2004 30.77
2005 33.33
2006 32.26
2007 30.00
2008 53.85
2009 42.31
2010 22.22
2011 31.25
2012 24.39
2013 38.71
2014 37.84
2015 35.14
2016 35.48
2017 35.48
2018 37.21
2019 34.48

Not every article in a journal is considered primary research and therefore “citable”, this chart shows the ratio of a journal’s articles including substantial research (research articles, conference papers and reviews) in three year windows vs. those documents other than research articles, reviews and conference papers.

Documents Year Value
Non-citable documents 1999 4
Non-citable documents 2000 4
Non-citable documents 2001 5
Non-citable documents 2002 6
Non-citable documents 2003 6
Non-citable documents 2004 5
Non-citable documents 2005 2
Non-citable documents 2006 1
Non-citable documents 2007 1
Non-citable documents 2008 2
Non-citable documents 2009 4
Non-citable documents 2010 5
Non-citable documents 2011 4
Non-citable documents 2012 4
Non-citable documents 2013 3
Non-citable documents 2014 4
Non-citable documents 2015 2
Non-citable documents 2016 3
Non-citable documents 2017 2
Non-citable documents 2018 2
Non-citable documents 2019 2
Citable documents 1999 127
Citable documents 2000 135
Citable documents 2001 143
Citable documents 2002 111
Citable documents 2003 104
Citable documents 2004 83
Citable documents 2005 91
Citable documents 2006 103
Citable documents 2007 105
Citable documents 2008 95
Citable documents 2009 83
Citable documents 2010 77
Citable documents 2011 75
Citable documents 2012 81
Citable documents 2013 97
Citable documents 2014 100
Citable documents 2015 107
Citable documents 2016 102
Citable documents 2017 103
Citable documents 2018 97
Citable documents 2019 103

Ratio of a journal’s items, grouped in three years windows, that have been cited at least once vs. those not cited during the following year.

Seed Science Research The set of journals have been ranked according to their SJR and divided into four equal groups, four quartiles. Q1 (green) comprises the quarter of the journals with the