Class information for:
Level 1: HUMIC ACID//HUMIN//BLOCH DECAY

Basic class information
Class id #P Avg. number of
references		 Database coverage
of references
6825 1440 32.7 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
4 4 ENVIRONMENTAL SCIENCES//GEOSCIENCES, MULTIDISCIPLINARY//METEOROLOGY & ATMOSPHERIC SCIENCES 1766162
65 3       SOIL SCIENCE//SOIL SCIENCE SOCIETY OF AMERICA JOURNAL//GEODERMA 84825
754 2             HUMIC ACID//HUMIC SUBSTANCES//DISSOLVED ORGANIC MATTER 12414
6825 1                   HUMIC ACID//HUMIN//BLOCH DECAY 1440

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 HUMIC ACID authKW 279251 14% 6% 207
2 HUMIN authKW 153159 2% 23% 31
3 BLOCH DECAY authKW 150778 1% 89% 8
4 HUMUS COMPOSITION authKW 132740 1% 52% 12
5 FULVIC ACID authKW 129149 5% 8% 73
6 SOIL SCIENCE WoSSC 92915 48% 1% 688
7 HUMIFICATION DEGREE authKW 92178 1% 43% 10
8 HUMIC SUBSTANCES authKW 90151 6% 5% 88
9 A TYPE HUMIC ACID authKW 84814 0% 100% 4
10 SOIL SCI AGR ENVIRONM PROTECT address 84810 0% 67% 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 92915 48% 1% 688
2 Environmental Sciences 3292 24% 0% 347
3 Geochemistry & Geophysics 958 8% 0% 112
4 Agronomy 832 7% 0% 100
5 Plant Sciences 825 12% 0% 171
6 Chemistry, Analytical 329 8% 0% 114
7 Spectroscopy 319 5% 0% 68
8 Engineering, Environmental 220 4% 0% 53
9 Chemistry, Applied 83 3% 0% 44
10 Forestry 62 1% 0% 21

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 SOIL SCI AGR ENVIRONM PROTECT 84810 0% 67% 6
2 LEHRSTUHL BODENKUNDE 53425 2% 8% 31
3 AIRSPACE RANGES AIR FIELD OPERAT 42407 0% 100% 2
4 LUE HING RD 38164 0% 60% 3
5 CITE 2 B 31802 0% 50% 3
6 QUEENSLAND FO TRY 27258 0% 43% 3
7 PEDOL AGR CHEM 23850 0% 38% 3
8 DIPARTIMENTO SCI CHIM AGR 22094 0% 15% 7
9 IST CHIM AGR 21873 1% 13% 8
10 ABT ZULASSUNG 21203 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 SOIL SCIENCE AND PLANT NUTRITION 37971 5% 2% 75
2 ORGANIC GEOCHEMISTRY 34327 6% 2% 81
3 GEODERMA 32610 6% 2% 91
4 EUROPEAN JOURNAL OF SOIL SCIENCE 29189 3% 3% 50
5 ZEITSCHRIFT FUR PFLANZENERNAHRUNG UND BODENKUNDE 21039 3% 3% 37
6 SOIL SCIENCE 17755 4% 2% 53
7 JOURNAL OF SOIL SCIENCE 11946 2% 3% 22
8 SOIL SCIENCE SOCIETY OF AMERICA JOURNAL 10808 5% 1% 69
9 EURASIAN SOIL SCIENCE 8759 3% 1% 36
10 AGROCHIMICA 6915 1% 2% 19

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 HUMIC ACID 279251 14% 6% 207 Search HUMIC+ACID Search HUMIC+ACID
2 HUMIN 153159 2% 23% 31 Search HUMIN Search HUMIN
3 BLOCH DECAY 150778 1% 89% 8 Search BLOCH+DECAY Search BLOCH+DECAY
4 HUMUS COMPOSITION 132740 1% 52% 12 Search HUMUS+COMPOSITION Search HUMUS+COMPOSITION
5 FULVIC ACID 129149 5% 8% 73 Search FULVIC+ACID Search FULVIC+ACID
6 HUMIFICATION DEGREE 92178 1% 43% 10 Search HUMIFICATION+DEGREE Search HUMIFICATION+DEGREE
7 HUMIC SUBSTANCES 90151 6% 5% 88 Search HUMIC+SUBSTANCES Search HUMIC+SUBSTANCES
8 A TYPE HUMIC ACID 84814 0% 100% 4 Search A+TYPE+HUMIC+ACID Search A+TYPE+HUMIC+ACID
9 HUMIFICATION PROCESS 79914 0% 54% 7 Search HUMIFICATION+PROCESS Search HUMIFICATION+PROCESS
10 CP MAS C 13 NMR 69229 1% 16% 21 Search CP+MAS+C+13+NMR Search CP+MAS+C+13+NMR

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 PRESTON, CM , (2015) ENVIRONMENTAL NMR - THE EARLY YEARS.MAGNETIC RESONANCE IN CHEMISTRY. VOL. 53. ISSUE 9. P. 635 -647 106 46% 1
2 PRESTON, CM , (1996) APPLICATIONS OF NMR TO SOIL ORGANIC MATTER ANALYSIS: HISTORY AND PROSPECTS.SOIL SCIENCE. VOL. 161. ISSUE 3. P. 144-166 74 50% 348
3 PRESTON, CM , (2001) CARBON-13 SOLID-STATE NMR OF SOIL ORGANIC MATTER - USING THE TECHNIQUE EFFECTIVELY.CANADIAN JOURNAL OF SOIL SCIENCE. VOL. 81. ISSUE 3. P. 255-270 61 60% 65
4 KNICKER, H , (2011) SOLID STATE CPMAS C-13 AND N-15 NMR SPECTROSCOPY IN ORGANIC GEOCHEMISTRY AND HOW SPIN DYNAMICS CAN EITHER AGGRAVATE OR IMPROVE SPECTRA INTERPRETATION.ORGANIC GEOCHEMISTRY. VOL. 42. ISSUE 8. P. 867 -890 48 51% 18
5 SMERNIK, RJ , BALDOCK, JA , (2005) DOES SOLID-STATE N-15 NMR SPECTROSCOPY DETECT ALL SOIL ORGANIC NITROGEN?.BIOGEOCHEMISTRY. VOL. 75. ISSUE 3. P. 507 -528 39 64% 31
6 RITCHIE, JD , PERDUE, EM , (2008) ANALYTICAL CONSTRAINTS ON ACIDIC FUNCTIONAL GROUPS IN HUMIC SUBSTANCES.ORGANIC GEOCHEMISTRY. VOL. 39. ISSUE 6. P. 783-799 43 52% 17
7 XU, JS , ZHAO, BZ , CHU, WY , MAO, JD , ZHANG, JB , (2017) CHEMICAL NATURE OF HUMIC SUBSTANCES IN TWO TYPICAL CHINESE SOILS (UPLAND VS PADDY SOIL): A COMPARATIVE ADVANCED SOLID STATE NMR STUDY.SCIENCE OF THE TOTAL ENVIRONMENT. VOL. 576. ISSUE . P. 444 -452 21 55% 1
8 COOK, RL , (2004) COUPLING NMR TO NOM.ANALYTICAL AND BIOANALYTICAL CHEMISTRY. VOL. 378. ISSUE 6. P. 1484-1503 42 52% 50
9 KHAN, NA , FUJITAKE, N , NODA, Y , SUZUKI, T , OTSUKA, H , (2006) COMPARISON OF HUMIC ACID FRACTIONS DERIVED FROM THERMALLY CREATED PLANT RESIDUES AND NATURAL SOILS: SPECTROSCOPIC AND ELEMENTAL ANALYSES.SOIL SCIENCE AND PLANT NUTRITION. VOL. 52. ISSUE 3. P. 349 -360 22 100% 4
10 KEELER, C , MACIEL, GE , (2003) QUANTITATION IN THE SOLID-STATE C-13 NMR ANALYSIS OF SOIL AND ORGANIC SOIL FRACTIONS.ANALYTICAL CHEMISTRY. VOL. 75. ISSUE 10. P. 2421-2432 31 70% 59

Classes with closest relation at Level 1


Rank Class id link
1 24899 AQUATIC HUMIC SUBSTANCES//SEC PAGE//EDTA AVAILABILITY
2 7893 THERMOCHEMOLYSIS//JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS//TETRAMETHYLAMMONIUM HYDROXIDE
3 3098 DENSITY FRACTIONATION//SOIL ORGANIC MATTER//MICROBIAL RESIDUES
4 6265 FULVIC ACID//HUMIC ACID//NICA DONNAN MODEL
5 18549 NUCLEO DESENVOLVIMENTO INSUMOS BIOL AGR NUDIBA//HORMONE LIKE ACTIVITY//HUMIC SUBSTANCES
6 22564 HUMIC LIKE ACID//ABIOTIC HUMIFICATION//COMPOST LIKE MATERIALS
7 26676 COAL SOLUBILIZATION//BIOSOLUBILIZATION//COAL BIOCONVERSION
8 20787 LIGNIN PHENOLS//PACIFIC OCEANOL//CUO OXIDATION
9 1447 DISSOLVED ORGANIC MATTER//CDOM//CHROMOPHORIC DISSOLVED ORGANIC MATTER
10 15032 SORBENT CONCENTRATION EFFECT//K DOC//DETERGENT MODEL

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