Journal of Crop Improvement

The Journal of Crop Improvement provides an international forum to evaluate and review the latest advancements in basic and applied aspects of crop improvement and production, including seed science and technology. The journal directly addresses emerging issues, new strategies for new needs, and future challenges of crop improvement, production, and seed science, especially those leading to a secure world food supply and resource conservation using environmentally-friendly technologies. The Journal of Crop Improvement intends to create a unique niche in the crop improvement, production, and seed science literature by not only publishing research and review articles on varied issues but also by developing a series of thematic issues on cutting-edge topics or research fronts in the field. The journal is a welcome and respected source of unparalleled, preeminent knowledge. Articles aim to: reveal novel concepts; achieve a new synthesis based on multifaceted, multilevel, and multidisciplinary approaches; identify key gaps in the knowledge that might be addressed by further research; and offer technical solutions to critical global problems in crop improvement, production, and seed science. Articles are presented in an understandable format, which can be directly used by students, teachers, researchers, practitioners, and advisors in the fields of genetics and plant breeding, molecular biology and biotechnology, transgenic crop technology, agronomy, soil science, crop physiology and biochemistry, ecology, agroclimatology, plant pathology, integrated pest management, seed science and technology, agrobiodiversity and other cognate sciences that are of prime interest to crop improvement and production.

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Quartiles

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
Agronomy and Crop Science	1999	Q2
Agronomy and Crop Science	2000	Q2
Agronomy and Crop Science	2001	Q3
Agronomy and Crop Science	2002	Q3
Agronomy and Crop Science	2003	Q3
Agronomy and Crop Science	2004	Q3
Agronomy and Crop Science	2005	Q3
Agronomy and Crop Science	2006	Q3
Agronomy and Crop Science	2007	Q3
Agronomy and Crop Science	2008	Q3
Agronomy and Crop Science	2009	Q3
Agronomy and Crop Science	2010	Q3
Agronomy and Crop Science	2011	Q3
Agronomy and Crop Science	2012	Q3
Agronomy and Crop Science	2013	Q3
Agronomy and Crop Science	2014	Q3
Agronomy and Crop Science	2015	Q3
Agronomy and Crop Science	2016	Q3
Agronomy and Crop Science	2017	Q3
Agronomy and Crop Science	2018	Q3
Agronomy and Crop Science	2019	Q3
Agronomy and Crop Science	2020	Q2
Agronomy and Crop Science	2021	Q2
Agronomy and Crop Science	2022	Q2
Agronomy and Crop Science	2023	Q2
Genetics	1999	Q3
Genetics	2000	Q4
Genetics	2001	Q4
Genetics	2002	Q4
Genetics	2003	Q4
Genetics	2004	Q4
Genetics	2005	Q4
Genetics	2006	Q4
Genetics	2007	Q4
Genetics	2008	Q4
Genetics	2009	Q4
Genetics	2010	Q4
Genetics	2011	Q4
Genetics	2012	Q4
Genetics	2013	Q4
Genetics	2014	Q4
Genetics	2015	Q4
Genetics	2016	Q4
Genetics	2017	Q4
Genetics	2018	Q4
Genetics	2019	Q4
Genetics	2020	Q4
Genetics	2021	Q4
Genetics	2022	Q4
Genetics	2023	Q4
Plant Science	1999	Q2
Plant Science	2000	Q2
Plant Science	2001	Q3
Plant Science	2002	Q3
Plant Science	2003	Q3
Plant Science	2004	Q3
Plant Science	2005	Q3
Plant Science	2006	Q3
Plant Science	2007	Q3
Plant Science	2008	Q3
Plant Science	2009	Q3
Plant Science	2010	Q3
Plant Science	2011	Q3
Plant Science	2012	Q3
Plant Science	2013	Q3
Plant Science	2014	Q3
Plant Science	2015	Q3
Plant Science	2016	Q3
Plant Science	2017	Q3
Plant Science	2018	Q3
Plant Science	2019	Q3
Plant Science	2020	Q3
Plant Science	2021	Q2
Plant Science	2022	Q2
Plant Science	2023	Q2
Soil Science	1999	Q3
Soil Science	2000	Q3
Soil Science	2001	Q3
Soil Science	2002	Q3
Soil Science	2003	Q3
Soil Science	2004	Q3
Soil Science	2005	Q3
Soil Science	2006	Q4
Soil Science	2007	Q3
Soil Science	2008	Q3
Soil Science	2009	Q4
Soil Science	2010	Q3
Soil Science	2011	Q3
Soil Science	2012	Q3
Soil Science	2013	Q3
Soil Science	2014	Q3
Soil Science	2015	Q3
Soil Science	2016	Q3
Soil Science	2017	Q3
Soil Science	2018	Q3
Soil Science	2019	Q3
Soil Science	2020	Q3
Soil Science	2021	Q2
Soil Science	2022	Q2
Soil Science	2023	Q2

SJR

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	0.483
2000	0.404
2001	0.301
2002	0.239
2003	0.206
2004	0.287
2005	0.251
2006	0.235
2007	0.297
2008	0.290
2009	0.182
2010	0.253
2011	0.316
2012	0.294
2013	0.227
2014	0.228
2015	0.299
2016	0.310
2017	0.221
2018	0.338
2019	0.298
2020	0.372
2021	0.385
2022	0.385
2023	0.389

Total Documents

Evolution of the number of published documents. All types of documents are considered, including citable and non citable documents.

Year	Documents
1999	30
2000	1
2001	70
2002	33
2003	41
2004	33
2005	45
2006	47
2007	25
2008	27
2009	26
2010	26
2011	48
2012	51
2013	45
2014	47
2015	48
2016	47
2017	43
2018	56
2019	46
2020	50
2021	44
2022	50
2023	46

Citations per document

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	0.667
Cites / Doc. (4 years)	2000	0.648
Cites / Doc. (4 years)	2001	1.036
Cites / Doc. (4 years)	2002	0.486
Cites / Doc. (4 years)	2003	0.612
Cites / Doc. (4 years)	2004	0.400
Cites / Doc. (4 years)	2005	0.452
Cites / Doc. (4 years)	2006	0.434
Cites / Doc. (4 years)	2007	0.458
Cites / Doc. (4 years)	2008	0.413
Cites / Doc. (4 years)	2009	0.396
Cites / Doc. (4 years)	2010	0.448
Cites / Doc. (4 years)	2011	0.875
Cites / Doc. (4 years)	2012	0.748
Cites / Doc. (4 years)	2013	0.755
Cites / Doc. (4 years)	2014	0.518
Cites / Doc. (4 years)	2015	0.728
Cites / Doc. (4 years)	2016	0.812
Cites / Doc. (4 years)	2017	0.701
Cites / Doc. (4 years)	2018	0.886
Cites / Doc. (4 years)	2019	0.954
Cites / Doc. (4 years)	2020	1.328
Cites / Doc. (4 years)	2021	1.723
Cites / Doc. (4 years)	2022	1.903
Cites / Doc. (4 years)	2023	1.879
Cites / Doc. (3 years)	1999	0.667
Cites / Doc. (3 years)	2000	0.648
Cites / Doc. (3 years)	2001	0.927
Cites / Doc. (3 years)	2002	0.436
Cites / Doc. (3 years)	2003	0.433
Cites / Doc. (3 years)	2004	0.403
Cites / Doc. (3 years)	2005	0.308
Cites / Doc. (3 years)	2006	0.403
Cites / Doc. (3 years)	2007	0.376
Cites / Doc. (3 years)	2008	0.393
Cites / Doc. (3 years)	2009	0.303
Cites / Doc. (3 years)	2010	0.474
Cites / Doc. (3 years)	2011	0.911
Cites / Doc. (3 years)	2012	0.830
Cites / Doc. (3 years)	2013	0.576
Cites / Doc. (3 years)	2014	0.444
Cites / Doc. (3 years)	2015	0.692
Cites / Doc. (3 years)	2016	0.793
Cites / Doc. (3 years)	2017	0.556
Cites / Doc. (3 years)	2018	0.754
Cites / Doc. (3 years)	2019	1.021
Cites / Doc. (3 years)	2020	1.366
Cites / Doc. (3 years)	2021	1.730
Cites / Doc. (3 years)	2022	1.893
Cites / Doc. (3 years)	2023	1.743
Cites / Doc. (2 years)	1999	0.667
Cites / Doc. (2 years)	2000	0.475
Cites / Doc. (2 years)	2001	0.742
Cites / Doc. (2 years)	2002	0.183
Cites / Doc. (2 years)	2003	0.437
Cites / Doc. (2 years)	2004	0.365
Cites / Doc. (2 years)	2005	0.284
Cites / Doc. (2 years)	2006	0.372
Cites / Doc. (2 years)	2007	0.348
Cites / Doc. (2 years)	2008	0.375
Cites / Doc. (2 years)	2009	0.231
Cites / Doc. (2 years)	2010	0.509
Cites / Doc. (2 years)	2011	1.192
Cites / Doc. (2 years)	2012	0.689
Cites / Doc. (2 years)	2013	0.424
Cites / Doc. (2 years)	2014	0.406
Cites / Doc. (2 years)	2015	0.620
Cites / Doc. (2 years)	2016	0.747
Cites / Doc. (2 years)	2017	0.495
Cites / Doc. (2 years)	2018	0.889
Cites / Doc. (2 years)	2019	1.030
Cites / Doc. (2 years)	2020	1.373
Cites / Doc. (2 years)	2021	1.615
Cites / Doc. (2 years)	2022	1.798
Cites / Doc. (2 years)	2023	1.777

Total Cites

Self-Cites

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	0
Self Cites	2000	0
Self Cites	2001	5
Self Cites	2002	4
Self Cites	2003	0
Self Cites	2004	3
Self Cites	2005	0
Self Cites	2006	0
Self Cites	2007	4
Self Cites	2008	3
Self Cites	2009	0
Self Cites	2010	4
Self Cites	2011	18
Self Cites	2012	11
Self Cites	2013	3
Self Cites	2014	6
Self Cites	2015	5
Self Cites	2016	10
Self Cites	2017	5
Self Cites	2018	6
Self Cites	2019	8
Self Cites	2020	16
Self Cites	2021	18
Self Cites	2022	6
Self Cites	2023	21
Total Cites	1999	16
Total Cites	2000	35
Total Cites	2001	38
Total Cites	2002	44
Total Cites	2003	45
Total Cites	2004	58
Total Cites	2005	33
Total Cites	2006	48
Total Cites	2007	47
Total Cites	2008	46
Total Cites	2009	30
Total Cites	2010	37
Total Cites	2011	72
Total Cites	2012	83
Total Cites	2013	72
Total Cites	2014	64
Total Cites	2015	99
Total Cites	2016	111
Total Cites	2017	79
Total Cites	2018	104
Total Cites	2019	149
Total Cites	2020	198
Total Cites	2021	263
Total Cites	2022	265
Total Cites	2023	251

External Cites per Doc

Cites per Doc

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	0.667
External Cites per document	2000	0.648
External Cites per document	2001	0.805
External Cites per document	2002	0.396
External Cites per document	2003	0.433
External Cites per document	2004	0.382
External Cites per document	2005	0.308
External Cites per document	2006	0.403
External Cites per document	2007	0.344
External Cites per document	2008	0.368
External Cites per document	2009	0.303
External Cites per document	2010	0.423
External Cites per document	2011	0.684
External Cites per document	2012	0.720
External Cites per document	2013	0.552
External Cites per document	2014	0.403
External Cites per document	2015	0.657
External Cites per document	2016	0.721
External Cites per document	2017	0.521
External Cites per document	2018	0.710
External Cites per document	2019	0.966
External Cites per document	2020	1.255
External Cites per document	2021	1.612
External Cites per document	2022	1.850
External Cites per document	2023	1.597
Cites per document	1999	0.667
Cites per document	2000	0.648
Cites per document	2001	0.927
Cites per document	2002	0.436
Cites per document	2003	0.433
Cites per document	2004	0.403
Cites per document	2005	0.308
Cites per document	2006	0.403
Cites per document	2007	0.376
Cites per document	2008	0.393
Cites per document	2009	0.303
Cites per document	2010	0.474
Cites per document	2011	0.911
Cites per document	2012	0.830
Cites per document	2013	0.576
Cites per document	2014	0.444
Cites per document	2015	0.692
Cites per document	2016	0.793
Cites per document	2017	0.556
Cites per document	2018	0.754
Cites per document	2019	1.021
Cites per document	2020	1.366
Cites per document	2021	1.730
Cites per document	2022	1.893
Cites per document	2023	1.743

% International Collaboration

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	10.00
2000	0.00
2001	17.14
2002	18.18
2003	24.39
2004	24.24
2005	26.67
2006	25.53
2007	32.00
2008	33.33
2009	42.31
2010	23.08
2011	39.58
2012	27.45
2013	31.11
2014	31.91
2015	18.75
2016	23.40
2017	41.86
2018	28.57
2019	45.65
2020	58.00
2021	36.36
2022	46.00
2023	32.61

Citable documents

Non-citable documents

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	1
Non-citable documents	2000	2
Non-citable documents	2001	2
Non-citable documents	2002	8
Non-citable documents	2003	10
Non-citable documents	2004	10
Non-citable documents	2005	6
Non-citable documents	2006	5
Non-citable documents	2007	7
Non-citable documents	2008	7
Non-citable documents	2009	5
Non-citable documents	2010	2
Non-citable documents	2011	0
Non-citable documents	2012	0
Non-citable documents	2013	0
Non-citable documents	2014	0
Non-citable documents	2015	0
Non-citable documents	2016	0
Non-citable documents	2017	1
Non-citable documents	2018	1
Non-citable documents	2019	1
Non-citable documents	2020	0
Non-citable documents	2021	0
Non-citable documents	2022	0
Non-citable documents	2023	0
Citable documents	1999	23
Citable documents	2000	52
Citable documents	2001	39
Citable documents	2002	93
Citable documents	2003	94
Citable documents	2004	134
Citable documents	2005	101
Citable documents	2006	114
Citable documents	2007	118
Citable documents	2008	110
Citable documents	2009	94
Citable documents	2010	76
Citable documents	2011	79
Citable documents	2012	100
Citable documents	2013	125
Citable documents	2014	144
Citable documents	2015	143
Citable documents	2016	140
Citable documents	2017	141
Citable documents	2018	137
Citable documents	2019	145
Citable documents	2020	145
Citable documents	2021	152
Citable documents	2022	140
Citable documents	2023	144

Cited documents

Uncited documents

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.

Documents	Year	Value
Uncited documents	1999	14
Uncited documents	2000	35
Uncited documents	2001	20
Uncited documents	2002	73
Uncited documents	2003	77
Uncited documents	2004	104
Uncited documents	2005	82
Uncited documents	2006	78
Uncited documents	2007	91
Uncited documents	2008	85
Uncited documents	2009	78
Uncited documents	2010	54
Uncited documents	2011	47
Uncited documents	2012	63
Uncited documents	2013	82
Uncited documents	2014	102
Uncited documents	2015	79
Uncited documents	2016	78
Uncited documents	2017	90
Uncited documents	2018	78
Uncited documents	2019	62
Uncited documents	2020	58
Uncited documents	2021	57
Uncited documents	2022	42
Uncited documents	2023	49
Cited documents	1999	10
Cited documents	2000	19
Cited documents	2001	21
Cited documents	2002	28
Cited documents	2003	27
Cited documents	2004	40
Cited documents	2005	25
Cited documents	2006	41
Cited documents	2007	34
Cited documents	2008	32
Cited documents	2009	21
Cited documents	2010	24
Cited documents	2011	32
Cited documents	2012	37
Cited documents	2013	43
Cited documents	2014	42
Cited documents	2015	64
Cited documents	2016	62
Cited documents	2017	52
Cited documents	2018	60
Cited documents	2019	84
Cited documents	2020	87
Cited documents	2021	95
Cited documents	2022	98
Cited documents	2023	95