NJAS - Wageningen Journal of Life Sciences

The NJAS - Wageningen Journal of Life Sciences, published since 1952, is the quarterly journal of the Royal Netherlands Society for Agricultural Sciences. NJAS aspires to be the main scientific platform for interdisciplinary and transdisciplinary research on complex and persistent problems in agricultural production, food and nutrition security and natural resource management. The societal and technical challenges in these domains require research integrating scientific disciplines and finding novel combinations of methodologies and conceptual frameworks. Moreover, the composite nature of these problems and challenges fits transdisciplinary research approaches embedded in constructive interactions with policy and practice and crossing the boundaries between science and society. Engaging with societal debate and creating decision space is an important task of research about the diverse impacts of novel agri-food technologies or policies. The international nature of food and nutrition security (e.g. global value chains, standardisation, trade), environmental problems (e.g. climate change or competing claims on natural resources), and risks related to agriculture (e.g. the spread of plant and animal diseases) challenges researchers to focus not only on lower levels of aggregation, but certainly to use interdisciplinary research to unravel linkages between scales or to analyse dynamics at higher levels of aggregation. NJAS recognises that the widely acknowledged need for interdisciplinary and transdisciplinary research, also increasingly expressed by policy makers and practitioners, needs a platform for creative researchers and out-of-the-box thinking in the domains of agriculture, food and environment. The journal aims to offer space for grounded, critical, and open discussions that advance the development and application of interdisciplinary and transdisciplinary research methodologies in the agricultural and life sciences.

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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	Q3
Agronomy and Crop Science	2001	Q2
Agronomy and Crop Science	2002	Q2
Agronomy and Crop Science	2003	Q3
Agronomy and Crop Science	2004	Q2
Agronomy and Crop Science	2005	Q3
Agronomy and Crop Science	2006	Q2
Agronomy and Crop Science	2007	Q2
Agronomy and Crop Science	2008	Q2
Agronomy and Crop Science	2009	Q3
Agronomy and Crop Science	2010	Q3
Agronomy and Crop Science	2011	Q3
Agronomy and Crop Science	2012	Q2
Agronomy and Crop Science	2013	Q2
Agronomy and Crop Science	2014	Q2
Agronomy and Crop Science	2015	Q2
Agronomy and Crop Science	2016	Q3
Agronomy and Crop Science	2017	Q1
Agronomy and Crop Science	2018	Q1
Agronomy and Crop Science	2019	Q1
Agronomy and Crop Science	2020	Q1
Agronomy and Crop Science	2021	Q1
Agronomy and Crop Science	2022	Q1
Agronomy and Crop Science	2023	Q1
Animal Science and Zoology	1999	Q2
Animal Science and Zoology	2000	Q2
Animal Science and Zoology	2001	Q2
Animal Science and Zoology	2002	Q3
Animal Science and Zoology	2003	Q3
Animal Science and Zoology	2004	Q2
Animal Science and Zoology	2005	Q3
Animal Science and Zoology	2006	Q3
Animal Science and Zoology	2007	Q3
Animal Science and Zoology	2008	Q2
Animal Science and Zoology	2009	Q3
Animal Science and Zoology	2010	Q3
Animal Science and Zoology	2011	Q3
Animal Science and Zoology	2012	Q2
Animal Science and Zoology	2013	Q2
Animal Science and Zoology	2014	Q2
Animal Science and Zoology	2015	Q2
Animal Science and Zoology	2016	Q3
Animal Science and Zoology	2017	Q1
Animal Science and Zoology	2018	Q1
Animal Science and Zoology	2019	Q1
Animal Science and Zoology	2020	Q1
Animal Science and Zoology	2021	Q1
Animal Science and Zoology	2022	Q1
Animal Science and Zoology	2023	Q1
Development	1999	Q1
Development	2000	Q2
Development	2001	Q2
Development	2002	Q2
Development	2003	Q2
Development	2004	Q1
Development	2005	Q2
Development	2006	Q2
Development	2007	Q2
Development	2008	Q2
Development	2009	Q2
Development	2010	Q3
Development	2011	Q2
Development	2012	Q2
Development	2013	Q2
Development	2014	Q2
Development	2015	Q2
Development	2016	Q3
Development	2017	Q1
Development	2018	Q2
Development	2019	Q1
Development	2020	Q1
Development	2021	Q1
Development	2022	Q1
Development	2023	Q1
Food Science	1999	Q1
Food Science	2000	Q2
Food Science	2001	Q2
Food Science	2002	Q2
Food Science	2003	Q3
Food Science	2004	Q2
Food Science	2005	Q3
Food Science	2006	Q2
Food Science	2007	Q2
Food Science	2008	Q2
Food Science	2009	Q3
Food Science	2010	Q3
Food Science	2011	Q3
Food Science	2012	Q2
Food Science	2013	Q2
Food Science	2014	Q2
Food Science	2015	Q2
Food Science	2016	Q3
Food Science	2017	Q2
Food Science	2018	Q1
Food Science	2019	Q1
Food Science	2020	Q1
Food Science	2021	Q1
Food Science	2022	Q1
Food Science	2023	Q1
Plant Science	1999	Q2
Plant Science	2000	Q3
Plant Science	2001	Q2
Plant Science	2002	Q2
Plant Science	2003	Q3
Plant Science	2004	Q2
Plant Science	2005	Q3
Plant Science	2006	Q3
Plant Science	2007	Q2
Plant Science	2008	Q2
Plant Science	2009	Q3
Plant Science	2010	Q3
Plant Science	2011	Q3
Plant Science	2012	Q2
Plant Science	2013	Q2
Plant Science	2014	Q2
Plant Science	2015	Q2
Plant Science	2016	Q3
Plant Science	2017	Q2
Plant Science	2018	Q2
Plant Science	2019	Q1
Plant Science	2020	Q1
Plant Science	2021	Q1
Plant Science	2022	Q1
Plant Science	2023	Q1

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	0.660
2000	0.380
2001	0.393
2002	0.383
2003	0.287
2004	0.460
2005	0.328
2006	0.399
2007	0.372
2008	0.474
2009	0.289
2010	0.226
2011	0.292
2012	0.590
2013	0.409
2014	0.648
2015	0.559
2016	0.314
2017	0.693
2018	0.726
2019	0.755
2020	1.023
2021	1.474
2022	1.841
2023	0.706

Total Documents

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

Year	Documents
1999	12
2000	22
2001	25
2002	5
2003	24
2004	0
2005	12
2006	24
2007	22
2008	37
2009	20
2010	7
2011	36
2012	22
2013	28
2014	30
2015	12
2016	43
2017	20
2018	32
2019	35
2020	25
2021	0
2022	0
2023	0

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	0.750
Cites / Doc. (4 years)	2000	0.625
Cites / Doc. (4 years)	2001	0.816
Cites / Doc. (4 years)	2002	0.574
Cites / Doc. (4 years)	2003	0.875
Cites / Doc. (4 years)	2004	0.592
Cites / Doc. (4 years)	2005	1.093
Cites / Doc. (4 years)	2006	0.951
Cites / Doc. (4 years)	2007	1.017
Cites / Doc. (4 years)	2008	1.069
Cites / Doc. (4 years)	2009	0.811
Cites / Doc. (4 years)	2010	0.650
Cites / Doc. (4 years)	2011	1.151
Cites / Doc. (4 years)	2012	1.460
Cites / Doc. (4 years)	2013	1.412
Cites / Doc. (4 years)	2014	1.774
Cites / Doc. (4 years)	2015	1.578
Cites / Doc. (4 years)	2016	1.283
Cites / Doc. (4 years)	2017	2.204
Cites / Doc. (4 years)	2018	2.838
Cites / Doc. (4 years)	2019	3.458
Cites / Doc. (4 years)	2020	4.792
Cites / Doc. (4 years)	2021	7.384
Cites / Doc. (4 years)	2022	8.641
Cites / Doc. (4 years)	2023	12.667
Cites / Doc. (3 years)	1999	0.750
Cites / Doc. (3 years)	2000	0.625
Cites / Doc. (3 years)	2001	0.778
Cites / Doc. (3 years)	2002	0.542
Cites / Doc. (3 years)	2003	0.846
Cites / Doc. (3 years)	2004	0.685
Cites / Doc. (3 years)	2005	0.793
Cites / Doc. (3 years)	2006	1.083
Cites / Doc. (3 years)	2007	0.528
Cites / Doc. (3 years)	2008	1.069
Cites / Doc. (3 years)	2009	0.880
Cites / Doc. (3 years)	2010	0.595
Cites / Doc. (3 years)	2011	1.016
Cites / Doc. (3 years)	2012	1.730
Cites / Doc. (3 years)	2013	1.415
Cites / Doc. (3 years)	2014	1.663
Cites / Doc. (3 years)	2015	1.113
Cites / Doc. (3 years)	2016	1.214
Cites / Doc. (3 years)	2017	2.365
Cites / Doc. (3 years)	2018	3.040
Cites / Doc. (3 years)	2019	3.337
Cites / Doc. (3 years)	2020	4.322
Cites / Doc. (3 years)	2021	8.272
Cites / Doc. (3 years)	2022	11.217
Cites / Doc. (3 years)	2023	4.120
Cites / Doc. (2 years)	1999	0.750
Cites / Doc. (2 years)	2000	0.571
Cites / Doc. (2 years)	2001	0.676
Cites / Doc. (2 years)	2002	0.383
Cites / Doc. (2 years)	2003	1.033
Cites / Doc. (2 years)	2004	0.448
Cites / Doc. (2 years)	2005	0.750
Cites / Doc. (2 years)	2006	0.000
Cites / Doc. (2 years)	2007	0.528
Cites / Doc. (2 years)	2008	1.239
Cites / Doc. (2 years)	2009	0.678
Cites / Doc. (2 years)	2010	0.474
Cites / Doc. (2 years)	2011	1.259
Cites / Doc. (2 years)	2012	1.674
Cites / Doc. (2 years)	2013	1.466
Cites / Doc. (2 years)	2014	1.100
Cites / Doc. (2 years)	2015	0.983
Cites / Doc. (2 years)	2016	1.143
Cites / Doc. (2 years)	2017	2.036
Cites / Doc. (2 years)	2018	2.873
Cites / Doc. (2 years)	2019	2.288
Cites / Doc. (2 years)	2020	4.761
Cites / Doc. (2 years)	2021	9.817
Cites / Doc. (2 years)	2022	2.840
Cites / Doc. (2 years)	2023	0.000

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	1
Self Cites	2001	12
Self Cites	2002	3
Self Cites	2003	17
Self Cites	2004	0
Self Cites	2005	0
Self Cites	2006	0
Self Cites	2007	2
Self Cites	2008	11
Self Cites	2009	6
Self Cites	2010	1
Self Cites	2011	0
Self Cites	2012	7
Self Cites	2013	1
Self Cites	2014	2
Self Cites	2015	4
Self Cites	2016	6
Self Cites	2017	8
Self Cites	2018	3
Self Cites	2019	17
Self Cites	2020	7
Self Cites	2021	0
Self Cites	2022	0
Self Cites	2023	0
Total Cites	1999	3
Total Cites	2000	10
Total Cites	2001	28
Total Cites	2002	32
Total Cites	2003	44
Total Cites	2004	37
Total Cites	2005	23
Total Cites	2006	39
Total Cites	2007	19
Total Cites	2008	62
Total Cites	2009	73
Total Cites	2010	47
Total Cites	2011	65
Total Cites	2012	109
Total Cites	2013	92
Total Cites	2014	143
Total Cites	2015	89
Total Cites	2016	85
Total Cites	2017	201
Total Cites	2018	228
Total Cites	2019	317
Total Cites	2020	376
Total Cites	2021	761
Total Cites	2022	673
Total Cites	2023	103

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	0.750
External Cites per document	2000	0.563
External Cites per document	2001	0.444
External Cites per document	2002	0.492
External Cites per document	2003	0.519
External Cites per document	2004	0.685
External Cites per document	2005	0.793
External Cites per document	2006	1.083
External Cites per document	2007	0.472
External Cites per document	2008	0.879
External Cites per document	2009	0.807
External Cites per document	2010	0.582
External Cites per document	2011	1.016
External Cites per document	2012	1.619
External Cites per document	2013	1.400
External Cites per document	2014	1.640
External Cites per document	2015	1.063
External Cites per document	2016	1.129
External Cites per document	2017	2.271
External Cites per document	2018	3.000
External Cites per document	2019	3.158
External Cites per document	2020	4.241
External Cites per document	2021	8.272
External Cites per document	2022	11.217
External Cites per document	2023	4.120
Cites per document	1999	0.750
Cites per document	2000	0.625
Cites per document	2001	0.778
Cites per document	2002	0.542
Cites per document	2003	0.846
Cites per document	2004	0.685
Cites per document	2005	0.793
Cites per document	2006	1.083
Cites per document	2007	0.528
Cites per document	2008	1.069
Cites per document	2009	0.880
Cites per document	2010	0.595
Cites per document	2011	1.016
Cites per document	2012	1.730
Cites per document	2013	1.415
Cites per document	2014	1.663
Cites per document	2015	1.113
Cites per document	2016	1.214
Cites per document	2017	2.365
Cites per document	2018	3.040
Cites per document	2019	3.337
Cites per document	2020	4.322
Cites per document	2021	8.272
Cites per document	2022	11.217
Cites per document	2023	4.120

% 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	8.33
2000	59.09
2001	40.00
2002	40.00
2003	4.17
2004	0
2005	16.67
2006	29.17
2007	40.91
2008	48.65
2009	30.00
2010	42.86
2011	44.44
2012	54.55
2013	17.86
2014	30.00
2015	66.67
2016	41.86
2017	60.00
2018	71.88
2019	40.00
2020	36.00
2021	0
2022	0
2023	0

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	0
Non-citable documents	2000	0
Non-citable documents	2001	0
Non-citable documents	2002	0
Non-citable documents	2003	0
Non-citable documents	2004	1
Non-citable documents	2005	1
Non-citable documents	2006	1
Non-citable documents	2007	3
Non-citable documents	2008	4
Non-citable documents	2009	6
Non-citable documents	2010	5
Non-citable documents	2011	4
Non-citable documents	2012	4
Non-citable documents	2013	5
Non-citable documents	2014	8
Non-citable documents	2015	9
Non-citable documents	2016	6
Non-citable documents	2017	4
Non-citable documents	2018	1
Non-citable documents	2019	2
Non-citable documents	2020	1
Non-citable documents	2021	1
Non-citable documents	2022	0
Non-citable documents	2023	0
Citable documents	1999	4
Citable documents	2000	16
Citable documents	2001	36
Citable documents	2002	59
Citable documents	2003	52
Citable documents	2004	53
Citable documents	2005	28
Citable documents	2006	35
Citable documents	2007	33
Citable documents	2008	54
Citable documents	2009	77
Citable documents	2010	74
Citable documents	2011	60
Citable documents	2012	59
Citable documents	2013	60
Citable documents	2014	78
Citable documents	2015	71
Citable documents	2016	64
Citable documents	2017	81
Citable documents	2018	74
Citable documents	2019	93
Citable documents	2020	86
Citable documents	2021	91
Citable documents	2022	60
Citable documents	2023	25

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	2
Uncited documents	2000	11
Uncited documents	2001	23
Uncited documents	2002	37
Uncited documents	2003	33
Uncited documents	2004	30
Uncited documents	2005	15
Uncited documents	2006	19
Uncited documents	2007	26
Uncited documents	2008	29
Uncited documents	2009	50
Uncited documents	2010	55
Uncited documents	2011	28
Uncited documents	2012	28
Uncited documents	2013	31
Uncited documents	2014	33
Uncited documents	2015	43
Uncited documents	2016	25
Uncited documents	2017	18
Uncited documents	2018	20
Uncited documents	2019	17
Uncited documents	2020	12
Uncited documents	2021	13
Uncited documents	2022	10
Uncited documents	2023	3
Cited documents	1999	2
Cited documents	2000	5
Cited documents	2001	13
Cited documents	2002	22
Cited documents	2003	19
Cited documents	2004	24
Cited documents	2005	14
Cited documents	2006	17
Cited documents	2007	10
Cited documents	2008	29
Cited documents	2009	33
Cited documents	2010	24
Cited documents	2011	36
Cited documents	2012	35
Cited documents	2013	34
Cited documents	2014	53
Cited documents	2015	37
Cited documents	2016	45
Cited documents	2017	67
Cited documents	2018	55
Cited documents	2019	78
Cited documents	2020	75
Cited documents	2021	79
Cited documents	2022	50
Cited documents	2023	22