Class information for:
Level 1: N 2 FIXATION//N 15 NATURAL ABUNDANCE//NDFA

Basic class information
Class id #P Avg. number of
references		 Database coverage
of references
6719 1452 31.0 50%


Bar chart of Publication_year

Last years might be incomplete

Hierarchy of classes
The table includes all classes above and classes immediately below the current class.


Cluster id Level Cluster label #P
3 4 PLANT SCIENCES//AGRONOMY//FOOD SCIENCE & TECHNOLOGY 1882812
40 3       AGRONOMY//SOIL SCIENCE//AGRICULTURE, MULTIDISCIPLINARY 100292
585 2             NODULATION//FRANKIA//RHIZOBIUM 14207
6719 1                   N 2 FIXATION//N 15 NATURAL ABUNDANCE//NDFA 1452

Terms with highest relevance score


rank Term termType Chi square Shr. of publ. in
class containing
term		 Class's shr. of
term's tot. occurrences		 #P with
term in
class
1 N 2 FIXATION authKW 366445 7% 16% 108
2 N 15 NATURAL ABUNDANCE authKW 317717 3% 34% 45
3 NDFA authKW 283322 1% 84% 16
4 REFERENCE PLANTS authKW 178114 1% 71% 12
5 N 15 ISOTOPE DILUTION authKW 170563 2% 34% 24
6 NITROGEN TRANSFER authKW 154530 1% 35% 21
7 N TRANSFER authKW 131278 1% 39% 16
8 N FIXED authKW 128796 0% 88% 7
9 N RHIZODEPOSITION authKW 126169 0% 100% 6
10 N BENEFIT authKW 108143 0% 86% 6

Web of Science journal categories


Rank Term Chi square Shr. of publ. in
class containing
term		 Class's shr. of
term's tot. occurrences		 #P with
term in
class
1 Soil Science 56529 37% 1% 540
2 Agronomy 42588 45% 0% 658
3 Plant Sciences 8162 33% 0% 485
4 Agriculture, Multidisciplinary 8057 16% 0% 229
5 Forestry 158 2% 0% 31
6 Horticulture 96 2% 0% 23
7 AGRICULTURAL EXPERIMENT STATION REPORTS 76 0% 0% 2
8 Environmental Sciences 48 5% 0% 69
9 Ecology 16 2% 0% 34
10 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY 8 0% 0% 7

Address terms


Rank Term Chi square Shr. of publ. in
class containing
term		 Class's shr. of
term's tot. occurrences		 #P with
term in
class
1 AGROPEDOCLIMAT ZONE CARAIBE UR135 42056 0% 100% 2
2 PLANT ECOPHYSIOL AGROECOL 37848 0% 60% 3
3 ISOTOPOS ESTABLES 32850 0% 31% 5
4 TAMWORTH CROP IMPROVEMENT 29227 1% 13% 11
5 SPN DIRECTORATE 28036 0% 67% 2
6 UMR INRA UCBN EVA 950 28036 0% 67% 2
7 GRP ECOLE SUPER AGR 23653 0% 38% 3
8 ORGAN FARMING UNIT 22424 0% 27% 4
9 AICRP LTFE 21028 0% 100% 1
10 BIOSCI BIO OURCESHIGASHI KU 21028 0% 100% 1

Journals


Rank Term Chi square Shr. of publ. in
class containing
term		 Class's shr. of
term's tot. occurrences		 #P with
term in
class
1 PLANT AND SOIL 91413 16% 2% 228
2 SOIL BIOLOGY & BIOCHEMISTRY 26918 7% 1% 105
3 AUSTRALIAN JOURNAL OF AGRICULTURAL RESEARCH 26346 4% 2% 65
4 AGRONOMY JOURNAL 20294 6% 1% 84
5 BIOLOGY AND FERTILITY OF SOILS 18667 4% 2% 56
6 FIELD CROPS RESEARCH 12522 4% 1% 51
7 AUSTRALIAN JOURNAL OF EXPERIMENTAL AGRICULTURE 8362 3% 1% 39
8 SOIL SCIENCE AND PLANT NUTRITION 8163 2% 1% 35
9 CROP SCIENCE 7228 5% 1% 68
10 EUROPEAN JOURNAL OF AGRONOMY 5751 1% 1% 21

Author Key Words


Rank Term Chi square Shr. of publ. in
class containing
term		 Class's shr. of
term's tot. occurrences		 #P with
term in
class		 LCSH search Wikipedia search
1 N 2 FIXATION 366445 7% 16% 108 Search N+2+FIXATION Search N+2+FIXATION
2 N 15 NATURAL ABUNDANCE 317717 3% 34% 45 Search N+15+NATURAL+ABUNDANCE Search N+15+NATURAL+ABUNDANCE
3 NDFA 283322 1% 84% 16 Search NDFA Search NDFA
4 REFERENCE PLANTS 178114 1% 71% 12 Search REFERENCE+PLANTS Search REFERENCE+PLANTS
5 N 15 ISOTOPE DILUTION 170563 2% 34% 24 Search N+15+ISOTOPE+DILUTION Search N+15+ISOTOPE+DILUTION
6 NITROGEN TRANSFER 154530 1% 35% 21 Search NITROGEN+TRANSFER Search NITROGEN+TRANSFER
7 N TRANSFER 131278 1% 39% 16 Search N+TRANSFER Search N+TRANSFER
8 N FIXED 128796 0% 88% 7 Search N+FIXED Search N+FIXED
9 N RHIZODEPOSITION 126169 0% 100% 6 Search N+RHIZODEPOSITION Search N+RHIZODEPOSITION
10 N BENEFIT 108143 0% 86% 6 Search N+BENEFIT Search N+BENEFIT

Core articles
The table includes core articles in the class. The following variables is taken into account for the relevance score of an article in a cluster c:
(1) Number of references referring to publications in the class.
(2) Share of total number of active references referring to publications in the class.
(3) Age of the article. New articles get higher score than old articles.
(4) Citation rate, normalized to year.


Rank Reference # ref.
in cl.		 Shr. of ref. in
cl.		 Citations
1 UNKOVICH, MJ , PATE, JS , (2000) AN APPRAISAL OF RECENT FIELD MEASUREMENTS OF SYMBIOTIC N-2 FIXATION BY ANNUAL LEGUMES.FIELD CROPS RESEARCH. VOL. 65. ISSUE 2-3. P. 211-228 81 76% 139
2 ANGLADE, J , BILLEN, G , GARNIER, J , (2015) RELATIONSHIPS FOR ESTIMATING N-2 FIXATION IN LEGUMES: INCIDENCE FOR N BALANCE OF LEGUME-BASED CROPPING SYSTEMS IN EUROPE.ECOSPHERE. VOL. 6. ISSUE 3. P. - 75 57% 7
3 SALVAGIOTTI, F , CASSMAN, KG , SPECHT, JE , WALTERS, DT , WEISS, A , DOBERMANN, A , (2008) NITROGEN UPTAKE, FIXATION AND RESPONSE TO FERTILIZER N IN SOYBEANS: A REVIEW.FIELD CROPS RESEARCH. VOL. 108. ISSUE 1. P. 1-13 69 60% 166
4 CHALK, PM , PEOPLES, MB , MCNEILL, AM , BODDEY, RM , UNKOVICH, MJ , GARDENER, MJ , SILVA, CF , CHEN, DL , (2014) METHODOLOGIES FOR ESTIMATING NITROGEN TRANSFER BETWEEN LEGUMES AND COMPANION SPECIES IN AGRO-ECOSYSTEMS: A REVIEW OF 15N-ENRICHED TECHNIQUES.SOIL BIOLOGY & BIOCHEMISTRY. VOL. 73. ISSUE . P. 10-21 57 74% 15
5 HERRIDGE, DF , PEOPLES, MB , BODDEY, RM , (2008) GLOBAL INPUTS OF BIOLOGICAL NITROGEN FIXATION IN AGRICULTURAL SYSTEMS.PLANT AND SOIL. VOL. 311. ISSUE 1-2. P. 1 -18 55 61% 277
6 CHALK, PM , LADHA, JK , (1999) ESTIMATION OF LEGUME SYMBIOTIC DEPENDENCE: AN EVALUATION TECHNIQUES BASED ON N-15 DILUTION.SOIL BIOLOGY & BIOCHEMISTRY. VOL. 31. ISSUE 14. P. 1901 -1917 65 88% 41
7 CHALK, PM , INACIO, CT , BALIEIRO, FC , ROUWS, JRC , (2016) DO TECHNIQUES BASED ON N-15 ENRICHMENT AND N-15 NATURAL ABUNDANCE GIVE CONSISTENT ESTIMATES OF THE SYMBIOTIC DEPENDENCE OF N-2-FIXING PLANTS?.PLANT AND SOIL. VOL. 399. ISSUE 1-2. P. 415 -426 41 93% 0
8 PEOPLES, MB , BROCKWELL, J , HERRIDGE, DF , ROCHESTER, IJ , ALVES, BJR , URQUIAGA, S , BODDEY, RM , DAKORA, FD , BHATTARAI, S , MASKEY, SL , ET AL (2009) THE CONTRIBUTIONS OF NITROGEN-FIXING CROP LEGUMES TO THE PRODUCTIVITY OF AGRICULTURAL SYSTEMS.SYMBIOSIS. VOL. 48. ISSUE 1-3. P. 1 -17 56 55% 106
9 DANSO, SKA , HARDARSON, G , ZAPATA, F , (1993) MISCONCEPTIONS AND PRACTICAL PROBLEMS IN THE USE OF N-15 SOIL ENRICHMENT TECHNIQUES FOR ESTIMATING N2 FIXATION.PLANT AND SOIL. VOL. 152. ISSUE 1. P. 25-52 67 87% 80
10 FUSTEC, J , LESUFFLEUR, F , MAHIEU, S , CLIQUET, JB , (2010) NITROGEN RHIZODEPOSITION OF LEGUMES. A REVIEW.AGRONOMY FOR SUSTAINABLE DEVELOPMENT. VOL. 30. ISSUE 1. P. 57 -66 47 64% 72

Classes with closest relation at Level 1


Rank Class id link
1 3650 UREIDES//LEGHEMOGLOBIN//NITROGEN FIXATION
2 17187 DELTA N 15//NATURAL N 15 ABUNDANCE//N 15 NATURAL ABUNDANCE
3 21963 SESBANIA ROSTRATA//STEM NODULE//AESCHYNOMENE AFRASPERA
4 533 RHIZOBIA//BRADYRHIZOBIUM//RHIZOBIUM
5 4635 INTERCROPPING//LAND EQUIVALENT RATIO//INDIAN JOURNAL OF AGRONOMY
6 35935 PERMANENT MEADOW STANDS//MEADOW SWARD//COMBINED INOCULATION
7 3566 COVER CROPS//CATCH CROP//ROLLER CRIMPER
8 28651 AGRO CLIMATIC CONDITIONS//BARLEY DROUGHT GROWTH STRAW GRAINS YIELD MACRO AND MICRONUTRIENTS//BLACKGRAM YIELDS
9 9194 DRYLAND STN//SUMMER FALLOW//SEMIARID PRAIRIE AGR
10 18314 RHIZODEPOSITION//C 14 PULSE LABELLING//C 14 PULSE LABELING

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