Class information for:
Level 1: CHLOROPHYLL METER//SPAD 502//SPAD

Basic class information
Class id #P Avg. number of
references		 Database coverage
of references
8512 1246 28.6 53%


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
974 2             AGRONOMY JOURNAL//SOIL SCIENCE//COVER CROPS 10652
8512 1                   CHLOROPHYLL METER//SPAD 502//SPAD 1246

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 CHLOROPHYLL METER authKW 997558 5% 62% 66
2 SPAD 502 authKW 230068 1% 72% 13
3 SPAD authKW 201308 3% 19% 43
4 ON FARM NETWORK address 196041 1% 100% 8
5 AGRONOMY JOURNAL journal 192554 19% 3% 239
6 SPAD METER authKW 148246 1% 55% 11
7 PSNT authKW 120071 1% 70% 7
8 PRECISION AGRICULTURE journal 113733 4% 10% 45
9 SPAD READING authKW 111376 1% 45% 10
10 YARA N SENSOR authKW 78415 0% 80% 4

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 Agronomy 36461 45% 0% 564
2 Soil Science 14005 20% 0% 251
3 Agriculture, Multidisciplinary 5255 14% 0% 172
4 Plant Sciences 2930 22% 0% 277
5 Agricultural Economics & Policy 1377 2% 0% 30
6 Horticulture 1232 5% 0% 67
7 Chemistry, Analytical 391 9% 0% 112
8 Agricultural Engineering 359 2% 0% 29
9 Forestry 39 1% 0% 16
10 Remote Sensing 33 1% 0% 11

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 ON FARM NETWORK 196041 1% 100% 8
2 VERNON JAMES EXT 55135 0% 75% 3
3 AGRIBUSINESS FARM MANAGEMENT GRP 49010 0% 100% 2
4 PLANT SOIL SCI 34254 7% 2% 83
5 GRP CULTIVAT REG DEV 32672 0% 67% 2
6 MEASUREMENT TEST ENGN 32672 0% 67% 2
7 WCREC 31503 0% 43% 3
8 ARABLE 27564 0% 38% 3
9 ICASD 27564 0% 38% 3
10 SHANDONG PROV DRYLAND FARMING TECH 27564 0% 38% 3

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 AGRONOMY JOURNAL 192554 19% 3% 239
2 PRECISION AGRICULTURE 113733 4% 10% 45
3 JOURNAL OF PRODUCTION AGRICULTURE 50243 3% 5% 42
4 COMMUNICATIONS IN SOIL SCIENCE AND PLANT ANALYSIS 39964 9% 2% 106
5 JOURNAL OF PLANT NUTRITION 38735 7% 2% 93
6 CANADIAN JOURNAL OF SOIL SCIENCE 5283 2% 1% 23
7 EUROPEAN JOURNAL OF AGRONOMY 4924 1% 1% 18
8 SOIL SCIENCE SOCIETY OF AMERICA JOURNAL 4171 3% 0% 40
9 FIELD CROPS RESEARCH 3210 2% 1% 24
10 JOURNAL OF FERTILIZER ISSUES 2897 0% 3% 4

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 CHLOROPHYLL METER 997558 5% 62% 66 Search CHLOROPHYLL+METER Search CHLOROPHYLL+METER
2 SPAD 502 230068 1% 72% 13 Search SPAD+502 Search SPAD+502
3 SPAD 201308 3% 19% 43 Search SPAD Search SPAD
4 SPAD METER 148246 1% 55% 11 Search SPAD+METER Search SPAD+METER
5 PSNT 120071 1% 70% 7 Search PSNT Search PSNT
6 SPAD READING 111376 1% 45% 10 Search SPAD+READING Search SPAD+READING
7 YARA N SENSOR 78415 0% 80% 4 Search YARA+N+SENSOR Search YARA+N+SENSOR
8 VARIABLE RATE 78119 1% 25% 13 Search VARIABLE+RATE Search VARIABLE+RATE
9 ATLEAF 73515 0% 100% 3 Search ATLEAF Search ATLEAF
10 IN SEASON NITROGEN MANAGEMENT 73515 0% 100% 3 Search IN+SEASON+NITROGEN+MANAGEMENT Search IN+SEASON+NITROGEN+MANAGEMENT

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 SAMBORSKI, SM , TREMBLAY, N , FALLON, E , (2009) STRATEGIES TO MAKE USE OF PLANT SENSORS-BASED DIAGNOSTIC INFORMATION FOR NITROGEN RECOMMENDATIONS.AGRONOMY JOURNAL. VOL. 101. ISSUE 4. P. 800-816 69 66% 84
2 FRANZEN, D , KITCHEN, N , HOLLAND, K , SCHEPERS, J , RAUN, W , (2016) ALGORITHMS FOR IN-SEASON NUTRIENT MANAGEMENT IN CEREALS.AGRONOMY JOURNAL. VOL. 108. ISSUE 5. P. 1775 -1781 36 86% 1
3 HUNT, ER , DAUGHTRY, CST , (2014) CHLOROPHYLL METER CALIBRATIONS FOR CHLOROPHYLL CONTENT USING MEASURED AND SIMULATED LEAF TRANSMITTANCES.AGRONOMY JOURNAL. VOL. 106. ISSUE 3. P. 931-939 45 73% 0
4 ZIADI, N , BRASSARD, M , BELANGER, G , CLAESSENS, A , TREMBLAY, N , CAMBOURIS, AN , NOLIN, MC , PARENT, LE , (2008) CHLOROPHYLL MEASUREMENTS AND NITROGEN NUTRITION INDEX FOR THE EVALUATION OF CORN NITROGEN STATUS.AGRONOMY JOURNAL. VOL. 100. ISSUE 5. P. 1264-1273 33 75% 46
5 CELA, S , BERENGUER, P , BALLESTA, A , SANTIVERI, F , LLOVERAS, J , (2013) PREDICTION OF RELATIVE CORN YIELD WITH SOIL-NITRATE TESTS UNDER IRRIGATED MEDITERRANEAN CONDITIONS.AGRONOMY JOURNAL. VOL. 105. ISSUE 4. P. 1101-1106 23 92% 1
6 YUAN, ZF , CAO, Q , ZHANG, K , ATA-UL-KARIM, ST , TIAN, YC , ZHU, Y , CAO, WX , LIU, XJ , (2016) OPTIMAL LEAF POSITIONS FOR SPAD METER MEASUREMENT IN RICE.FRONTIERS IN PLANT SCIENCE. VOL. 7. ISSUE . P. - 26 76% 0
7 DHITAL, S , RAUN, WR , (2016) VARIABILITY IN OPTIMUM NITROGEN RATES FOR MAIZE.AGRONOMY JOURNAL. VOL. 108. ISSUE 6. P. 2165 -2173 33 55% 0
8 FORRESTAL, PJ , KRATOCHVIL, RJ , MEISINGER, JJ , (2012) LATE-SEASON CORN MEASUREMENTS TO ASSESS SOIL RESIDUAL NITRATE AND NITROGEN MANAGEMENT.AGRONOMY JOURNAL. VOL. 104. ISSUE 1. P. 148-157 24 80% 7
9 KITCHEN, NR , SUDDUTH, KA , DRUMMOND, ST , SCHARF, PC , PALM, HL , ROBERTS, DF , VORIES, ED , (2010) GROUND-BASED CANOPY REFLECTANCE SENSING FOR VARIABLE-RATE NITROGEN CORN FERTILIZATION.AGRONOMY JOURNAL. VOL. 102. ISSUE 1. P. 71-84 26 70% 42
10 SAMBORSKI, SM , GOZDOWSKI, D , STEPIEN, M , WALSH, OS , LESZCZYNSKA, E , (2016) ON-FARM EVALUATION OF AN ACTIVE OPTICAL SENSOR PERFORMANCE FOR VARIABLE NITROGEN APPLICATION IN WINTER WHEAT.EUROPEAN JOURNAL OF AGRONOMY. VOL. 74. ISSUE . P. 56 -67 21 84% 0

Classes with closest relation at Level 1


Rank Class id link
1 12613 QUEFTS//NITRATE LEACHING//LEAF COLOR CHART
2 13569 INTERNAL BROWN SPOT//AMERICAN POTATO JOURNAL//SOLANUM TUBEROSUM
3 535 VEGETATION INDICES//REMOTE SENSING//VEGETATION INDEX
4 13639 MODELING KNOWLEDGE TRANSFER//SOIL SCIENCE//POTENTIALLY MINERALIZABLE N
5 20204 RELATIVE ADDITION RATE//CRITICAL NITROGEN CONCENTRATION//RELATIVE UPTAKE RATE
6 8748 GRAIN PROTEIN CONCENTRATION//GRAIN PROTEIN//NITROGEN HARVEST INDEX
7 13960 AGRONOMY JOURNAL//JOURNAL OF FERTILIZER ISSUES//N CENT KANSAS EXPT FIELD
8 3352 MANAGEMENT ZONES//GEOSTATISTICS//PRECISION AGRICULTURE
9 18861 ADDED N INTERACTION//N 15 LABELLED FERTILIZER//FERTILIZER N UPTAKE
10 33943 MINERAL N DEFICIT//UNIT CROPPING SYST DRY ENVIRONM AZIENDA SPERI//UNIT STUDY CROPPING SYST

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