Class information for:
Level 1: CHLOROPHYLL METER//NITROGEN NUTRITION INDEX//SPAD

Basic class information
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 GEOSCIENCES, MULTIDISCIPLINARY//GEOCHEMISTRY & GEOPHYSICS//METEOROLOGY & ATMOSPHERIC SCIENCES 1953906
53 3       SOIL SCIENCE//SOIL SCIENCE SOCIETY OF AMERICA JOURNAL//AGRONOMY 95847
794 2             SOIL SCIENCE//ARCHIV FUR ACKER UND PFLANZENBAU UND BODENKUNDE-ARCHIVES OF AGRONOMY AND SOIL SCIENCE//AGRONOMY 12387
9223 1                   CHLOROPHYLL METER//NITROGEN NUTRITION INDEX//SPAD 1207

Terms with highest relevance score


rank Category termType chi_square shrOfCwithTerm shrOfTermInClass termInClass
1 CHLOROPHYLL METER authKW 1012012 5% 60% 65
2 NITROGEN NUTRITION INDEX authKW 373195 2% 53% 27
3 SPAD authKW 215031 4% 19% 44
4 SPAD 502 authKW 200562 1% 59% 13
5 AGRONOMY JOURNAL journal 182263 19% 3% 227
6 SPAD METER authKW 179030 1% 57% 12
7 CRITICAL NITROGEN CONCENTRATION authKW 167101 1% 80% 8
8 ON FARM NETWORK address 159922 1% 88% 7
9 ACCUMULATED NITROGEN DEFICIT authKW 130550 0% 100% 5
10 ATLEAF authKW 130550 0% 100% 5

Web of Science journal categories


chi_square_rank Category chi_square shrOfCwithTerm shrOfTermInClass termInClass
1 Agronomy 41225 49% 0% 588
2 Soil Science 9364 17% 0% 202
3 Agriculture, Multidisciplinary 3815 12% 0% 145
4 Plant Sciences 3185 23% 0% 283
5 Horticulture 1497 6% 0% 72
6 Chemistry, Analytical 208 7% 0% 86
7 Agricultural Engineering 202 2% 0% 22
8 Agricultural Economics & Policy 48 0% 0% 6
9 Forestry 47 1% 0% 17
10 Water Resources 25 2% 0% 23

Address terms


chi_square_rank term chi_square shrOfCwithTerm shrOfTermInClass termInClass
1 ON FARM NETWORK 159922 1% 88% 7
2 JIANGSU INFORMAT AGR 73410 1% 19% 15
3 ENGN TECHNOL INFORMAT AGR 60190 1% 14% 16
4 7180 46996 0% 60% 3
5 STN ECOPHYSIOL PLANTES FOURRAGE 37973 0% 36% 4
6 GRP CULTIVAT REG DEV 34812 0% 67% 2
7 MEASUREMENT TEST ENGN 34812 0% 67% 2
8 UNITE ECOPHYSIOL PLANTES FOURRAGE 30312 0% 19% 6
9 JIANGSU ABORAT INNOVAT MODERN CROP PROD 29653 1% 11% 10
10 PLANT SOIL SCI 28959 6% 1% 76

Journals


chi_square_rank term chi_square shrOfCwithTerm shrOfTermInClass termInClass
1 AGRONOMY JOURNAL 182263 19% 3% 227
2 PRECISION AGRICULTURE 50588 2% 6% 30
3 JOURNAL OF PRODUCTION AGRICULTURE 46158 3% 5% 39
4 JOURNAL OF PLANT NUTRITION 34401 7% 2% 86
5 COMMUNICATIONS IN SOIL SCIENCE AND PLANT ANALYSIS 23865 7% 1% 80
6 EUROPEAN JOURNAL OF AGRONOMY 10594 2% 2% 26
7 FIELD CROPS RESEARCH 9723 3% 1% 41
8 JOURNAL OF FERTILIZER ISSUES 6951 0% 4% 6
9 AGRONOMIE 4910 2% 1% 19
10 PHOTOSYNTHETICA 3358 2% 1% 20

Author Key Words


chi_square_rank term chi_square shrOfCwithTerm shrOfTermInClass termInClass LCSH search Wikipedia search
1 CHLOROPHYLL METER 1012012 5% 60% 65 Search CHLOROPHYLL+METER Search CHLOROPHYLL+METER
2 NITROGEN NUTRITION INDEX 373195 2% 53% 27 Search NITROGEN+NUTRITION+INDEX Search NITROGEN+NUTRITION+INDEX
3 SPAD 215031 4% 19% 44 Search SPAD Search SPAD
4 SPAD 502 200562 1% 59% 13 Search SPAD+502 Search SPAD+502
5 SPAD METER 179030 1% 57% 12 Search SPAD+METER Search SPAD+METER
6 CRITICAL NITROGEN CONCENTRATION 167101 1% 80% 8 Search CRITICAL+NITROGEN+CONCENTRATION Search CRITICAL+NITROGEN+CONCENTRATION
7 ACCUMULATED NITROGEN DEFICIT 130550 0% 100% 5 Search ACCUMULATED+NITROGEN+DEFICIT Search ACCUMULATED+NITROGEN+DEFICIT
8 ATLEAF 130550 0% 100% 5 Search ATLEAF Search ATLEAF
9 DILUTION CURVE 128536 1% 62% 8 Search DILUTION+CURVE Search DILUTION+CURVE
10 PSNT 127935 1% 70% 7 Search PSNT Search PSNT

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.

Classes with closest relation at Level 1


rank cluster_id2 link
1 14106 QUEFTS//INT PLANT NUTR IPNI CHINA PROGRAM//OURCES ENVIRONM FOOD SECUR
2 13222 SOUTHWEST FLORIDA EDUC SWFREC//AMERICAN JOURNAL OF POTATO RESEARCH//SOLANUM TUBEROSUM
3 12322 GRAIN PROTEIN CONCENTRATION//NITROGEN HARVEST INDEX//GRAIN PROTEIN DEVIATION
4 449 VEGETATION INDICES//VEGETATION INDEX//REMOTE SENSING
5 14121 ANAEROBIC INCUBATION//SOIL SCIENCE//POTENTIALLY MINERALIZABLE N
6 8392 MANAGEMENT ZONES//EM38//APPARENT ELECTRICAL CONDUCTIVITY
7 35488 NLEAP//SOIL PLANT NUTRIENT UNIT//WNTSC
8 3993 MAYDICA//KERNEL NUMBER//ZEA MAYS L
9 7733 COVER CROPS//ROLLER CRIMPER//HAIRY VETCH
10 6756 CATCH CROP//NITRATE LEACHING//SOIL USE AND MANAGEMENT

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