citation analysis of ph. d theses in crop …crop physiology is a branch of agricultural sciences...

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International Journal of Library & Information Science (IJLIS)

Volume 6, Issue 5, September–October 2017, pp. 100–112, Article ID: IJLIS_06_05_010

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CITATION ANALYSIS OF PH. D THESES IN

CROP PHYSIOLOGY SUBMITTED TO

UNIVERSITY OF AGRICULTURAL SCIENCE

DHARWAD

Jayalaxmi Kittur

Research Scholar, Rani Channamma University,

Belagavi, Karnataka, India

Dr. Vinayak Bankapur

Chairman, Department of Library and Information Science,

Rani Channamma University, Belagavi, Karnataka, India

ABSTRACT

The present is study is the analysis of citations appended on doctoral dissertations

in Crop Physiology submitted to University of Agricultural Sciences Dharwad. There

are total 36 doctoral theses awarded in the duration 1987 to 2013 and these 36 theses

yielded 7499 citations. These citations were analyzed to find the information seeking

pattern of Crop Physiology researchers in UAS Dharwad. Citations are analyzed to

find the bibliographic forms approached by researchers, chronological distribution of

citations, geographic distribution of citations, and to prepare the ranked list of

journals.

Methodology: Methodology opted for study is simple counting of citations

Findings:

Researchers of crop physiology prefer journal articles. 75.5% of total

citations are journal articles.

Researchers cited Indian originated publications more than other

countries.

Key words: Journal Ranking, Bradford’s law of journal scattering , Citation Analysis,

Bibliometric Analysis.

Cite this Article: Jayalaxmi Kittur and Dr. Vinayak Bankapur, Citation Analysis of

Ph. D Theses in Crop Physiology Submitted to University of Agricultural Science

Dharwad. International Journal of Library & Information Science, 6(5), 2017, pp.

100–112.

http://www.iaeme.com/IJLIS/issues.asp?JType=IJLIS&VType=6&IType=5

Citation Analysis of Ph. D Theses in Crop Physiology Submitted to University of Agricultural

Science Dharwad


1. INTRODUCTION

Citations mentioned in scholarly communication are guide to other researchers working in

same field. Citations or the references mentioned in theses or dissertations are used as a tool

to know the information seeking pattern of researchers of the institute. Citation analysis is a

technique of bibliometric study of literature based upon some degree of relationship between

citing and cited articles or documents. Citation analysis is used to know which periodicals are

most productive in a particular field of knowledge. It is used to identify the pattern of

publication, authorship, citation and secondary journal’s coverage. The earliest citation

analysis carried out by Gross and Gross in the year 1927. He attempted to rank the journals in

Chemistry.

Crop Physiology is a branch of Agricultural sciences which deals with the study about

seed physiology, seed structure, and morphological physiological and biochemical changes

during seed development. University of Agricultural Sciences Dharwad is established in the

year 1986. University is offering UG, Doctoral and Post-Doctoral programmes in Agricultural

Sciences and Home Science. The first PhD awarded by the Department of Crop Physiology

earlier the department known as Agricultural Botany in the year 1987

2. OBJECTIVES

The study carried out with following objectives

To find the number of doctoral theses submitted per year.

To know the bibliographic forms approached by researchers.

To find the degree of collaboration authorship in Crop Physiology.

To study the geographic distribution of publications

To study the age wise distribution of citations and to calculate the obsolescence of

publications in Crop physiology

To prepare the rank list of journals.

3. HYPOTHESIS

Journals are most approached by researchers than other forms

Collaborative authorship is high

Indian publications are cited more compared to other countries

4. REVIEW OF RELATED LITERATURE

Zipp( 1996 ) not only analyzes the citations of the dissertations to evaluate the collection of

the library specialized in Geology, but also studies the citations of the articles published by

the researchers and compares both results. Gooden ( 2001 ) analyzes the Ph.D. dissertations of

the Ohio State University Chemistry Department between 1996 and 2000. The conclusion

reached is that only 12 journals are necessary to cover 50 percent of the references and

demonstrates that most of the citations correspond to articles published in scientific journals.

Shafi and Gazi (2005) studied citations of Doctoral Thesis submitted to Kashmir University in

Natural Sciences. They analyzed 11,862 citations for identifying bibliographic form, citation

potential, journal ranking and to study the obsolescence rate..

Prashant P. Deshmukh ( 1998 ) under took study of citation analysis of Ph. D. Theses

submitted to Punjabrao Krishi vidya peeth during 1990 – 94 for the doctoral degree under the

guidance of P. S. G. Kumar. . The Phd theses accepted in the duration 1990 -94 are the source

for the study. There are 89 theses accepted to award doctoral degree. Total 11698 citations are

Jayalaxmi Kittur and Dr. Vinayak Bankapur


analyzed to find the format of citations, authorship pattern, core journals, geographical

distribution of publications, Age wise distribution of citations. The study also extended to

check the availability of resources which are cited in doctoral theses. The subjects come under

agricultural sciences taken for study are, Agricultural chemistry, Agriculture Economics,

Agriculture extension education, Agronomy, Botany, Entomology, Horticulture, Plant

Pathology and Veterinary sciences Banateppanvar, Koteppa, Biradar, B.S., and

Kannappanavar B.U. (2013)studied the citations appended on doctoral theses of botany,

submitted to the Kuvempu University during the years 2000-2006 to suggest in collection

development of the library.

5. SCOPE AND LIMITATIONS OF THE STUDY

The present study is Citation analysis of Doctoral thesis of Crop Physiology submitted to

University of Agricultural Sciences Dharwad in the duration 1987 to 2013. There are 36

doctoral theses submitted to the department of Crop Physiology in the duration 1987 to 2013

in University of Agricultural Sciences Dharwad. These 36 theses having 7498 citations.

Citations are analyzed to check the Bibliographic form, Authorship pattern, Age wise

distribution, Geographic distribution, Language wise distribution of citations appended on the

theses of Crop Physiology.

6. METHODOLOGY

Simple citation counting is opted methodology for the present study. Each theses submitted in

the department of Crop Physiology in University of Agricultural Sciences Dhawad in the

duration 1987 to 2013 are approached physically. The bibliographic information of every

thesis i.e. title of the thesis, researcher name, guide name, thesis number, year of submission

are recorded in a particular format in Excel sheet. The citations are also entered in excel sheet

for the analysis. The Author, Title, Journal Name/Book Title/conference name, type of

resource (journal/book/proceedings/reports) , Year of publication, Place(country) of

publication are recorded in excel sheet. Place of publications of Journal articles are found by

searching them in Worldcat, NBM catalogue, and through the google.

7. RESULTS AND ANALYSIS

There are total 36 Ph Ds awarded in the duration 1987 to 2013 in the department of crop

physiology of University of Agricultural Sciences Dharwad. The year wise distribution of

theses is given in the following Table 1. The data shows that on an average every year at least

one Ph.D. is awarded by the department. The number of theses increased after 1990. The

highest number of theses received in the year 1995-1999 & 2004-2007 i.e. 8 (22.2%) of theses

awarded PhD. 6 theses are awarded Ph. D in the duration 1991-94 and in 2000-2003. More

citations cited in those theses submitted in period 2000-2003 average citation per thesis in this

period found 275. Average citations found in thesis are 208.

Table 1 Yearwise distribution of theses

Sl.

No

Year No of

Theses

Percentage Average

Thesis per

year

Citations Average

citations per

theses

1 1987-1990 2 5.50% 0.5 456 228

2 1991-1994 6 16.70% 1.5 1075 179.166667

3 1995-1999 8 22.20% 2 1207 150.875

4 2000-2003 6 16.70% 1.5 1648 274.666667

5 2004-2007 8 22.20% 2 1690 211.25

6 2008-2013 6 16.70% 1.5 1422 237

s Total 36 100% 1.38 7498 208.277778


Science Dharwad


7.1. Bibliographic form wise distribution of citations

Crop physiology scientists approached journals, books, reports, statistics, survey reports,

proceedings of conferences/workshops/seminars/symposiums for their research work. The

data is presented in the following Table 2. The data obtained reveals that researchers prefer

and rely on journal articles most. 75.5 % of the citations are journal articles. The rest 24.5% of

citations are Books (9.5%) , Proceedings (5.45) Theses MSc and PhD ( 3.8%) Newsletter (1.5

%) Annual reports ( .9%) Reports (.89%), Abstracts, newspapers, Monographs, E-Resources,

Hand books, manuals, survey reports etc.. All together form 24.5%. The data proved the first

hypothesis journals are most preferable form of information for the researchers. Journals gives

nascent and authentic information and time barrier is less compared to book s and other forms

of resources. Hence the researchers always prefer journals for their information need.

Table 2 Bibliographic form wise distribution of citations

Type of resource No. of Citations Cumulative Percentage

Journals 5667 5667 75.58015471

Books 718 6385 9.575886903

Proceedings 409 6794 5.454787943

Thesis MSc ( Agri) 196 6990 2.614030408

Thesis PhD 91 7081 1.213656975

News Letter 113 7263 1.507068552

Annual Report 69 7330 0.920245399

Report 67 7330 0.893571619

Abstracts 52 7382 0.693518272

E resources 47 7429 0.626833822

Monographs 11 7440 0.146705788

Year book 10 7450 0.133368898

Research Report 9 7459 0.120032009

Hand book 8 7467 0.106695119

Govt Pub 6 7473 0.080021339

Paper 5 7478 0.066684449

Manual 7 7485 0.093358229

Encyclopedia 3 7488 0.04001067

News paper 2 7490 0.02667378

Lecture Notes 1 7491 0.01333689

Letter 1 7492 0.01333689

Statistics 3 7495 0.04001067

Survey 3 7498 0.04001067

Total 7498

100

Figure 1

Type of resource

Journals

Books

Proceedings

Thesis MSc ( Agri)

Thesis PhD



7.2. Chronological distribution of citations

The chronological distribution of citations is given the table 3. It is found from data that the

oldest citation cited in crop physiology Ph D theses is 1831. The citations published in the

duration 1831 to 1950 found in theses is 236 (3.2 %). The research data reveals that

researchers cited highest citations 29.6 % of citations (2216) which are published in the

duration 1981 to 1990. Very least number of citations cited after 2010 as data chosen for the

study theses submitted in the duration 1987-2013 . This data shows that researchers referred

latest literature.

Table 3 Chronological distribution of citations

Year Citations Cumulative

Citations Percentage

1831-1950 236 236 3.2

1951-1960 271 507 3.6

1961-1970 830 1337 11

1971-1980 1891 3228 25.2

1981-1990 2216 5444 29.6

1991-2000 1614 7058 21.5

2001-2010 419 7477 5.6

2010- 21 7498 0.3

100

7.3. Authorship Pattern

Authorship study is one of the important application of bibliometric study, this is to find the

author productivity, impact factor of authors, ranking of authors based on the citations cited

by the particular author. Here authorship pattern is studied to find the degree of collaboration.

Most of the scientific studies are carried in collaboration as the studies cannot be handled by

single person most of the time. Most of the experiments inventions researches carried out with

team in research institutes. The following table 4 is about the distribution of citations on the

base of its authorship. The found data revealed that only 28.74% citations are single authored

and rest all multiple authored. Researchers cited some citations i.e. annual reports, reports

which are authored by corporate authorship they are about 0.6% .

Table 4 Number of Authors wise distribution Citations

SlNo No.of Authors

No.of

citations Percentage Ranking

1 1 2155 28.74 2

2 2 2531 33.76 1

3 3 1576 21.02 3

4 4 824 11 4

5 5 211 2.8 5

6 6 96 1.28 6

7 7 27 0.36 9

8 More than 7 33 0.44 8

9 Corporate Author 45 0.6 7

100


Science Dharwad


Figure 2

Degree of Collaboration in a discipline is calculated by the formula. Year wise calculation

is given in the table 5

DC = Nm/ Nm+Ns

Nm = Number of Multi Authored Papers

Ns= Number of Single Authored Papers

DC= 5343/7498

= 0.712

Table 5 Year wise calculation of Degree of collaboration

Year Single Two Three

More

than

Three CA

Total

Citations Nm DC = Nm/Ns+NM

1974-1979 349 450 251 140 5 1195 846 0.707949791

1980-1984 262 429 256 145 3 1095 833 0.760730594

1985-1990 348 473 310 209 10 1350 1002 0.742222222

1991-1995 168 279 257 215 7 926 758 0.818574514

1996-2000 142 179 158 209 1 689 547 0.793904209

2001-2005 66 84 80 106 3 339 273 0.805309735

2006-2010 12 17 21 29 1 80 68 0.85

Total 1347 1911 1333 1053 30 5674 4327 0.762601339

7.4. Geographic Distribution of citations

Geographic distribution of citations is computed to know which country is productive in the

particular subject area. The present study is aimed to know the publications from which

country is referred more by researchers in Crop Physiology of UAS Dharwad. The following

table No. 6 gives the data regarding country wise distribution of citations. Indian publications

are approached more frequently than other countries. Publications which are published in

India are cited most and India ranked first i.e it is about 36.9 % of citations are from India.

The USA ranked second covers 28.03% and UK ranked third covers 8.52% of citations.

Researchers approached worldwide literature for their research fulfillment. There were some

citations whose place of publication could not identify. There are 89 such citations 1.18% of

total citations. The following chart and table 6 illustrates geographical distribution of citations

No.of Authors

1

2

3

4

5

6

7



Table 6 Geographic wise distribution of citations

Sl. No

Place of

publication No of citations Percentage Rank

1 India 2774 36.9 1

2 USA 2102 28.03 2

3 UK 641 8.52 3

4 Netherlands 278 3.7 4

5 Germany 233 3.1 5

6 Australia 224 2.9 6

7 China 130 1.72 7

8 Japan 96 1.2 8

9 Scandinavian 89 1.1 9

10 Belgium 68 0.9 10

11 Philippines 63 0.8 11

12 Canada 61 0.8 12

13 Pakistan 57 0.7 13

14 Russia 55 0.7 14

15 Brazil 52 0.7 15

16 Egypt 45 0.6 16

17 Czecoslovakia 44 0.57 17

18 Italy 33 0.43 18

19 Nigeria 26 0.35 19

20 NA 89 1.18 20

21 Other Countries 338 5.1

Total 7498 100

Figure 3

7.5. Citation Frequency for Crop Physiology

Table 7 shows the age wise dispersion of cited books and journal articles . It is clear from the

following table 7 the one fourth of citations i.e. 25 % of book citations are 15 years old and 50

% of total citations are 25 years old. 75 % of the citations are 35 years old hence the books in

crop physiology will become obsolete after 35 years.

Table 8 reveals that the 25 % of citations are 9 years old and 50% of citations are 16 years

old hence the half-life of journal articles is 16 years for the crop physiology and 75% of

citations are 25 years old hence the journal articles will become obsolete after 25 years in crop

physiology

India

USA

UK

Netharlands

Germany

Australia

China


Science Dharwad


Table 7 Citation frequency in Crop Physiology

Books Journals

Age of

citatio

ns

No of

Citatio

ns

Cumulati

ve

Citations

Percenta

ge

Cumulati

ve

Percenta

ge

Age

in

Yea

rs

No .of

Citatio

ns

Cumulati

ve

Citations

percenta

ge

Cumulati

ve

Percenta

ge

0 1 1 0.145349 0.145349 0 8 8 0.139543 0.139543

1 1 2 0.145349 0.290698 1 37 45 0.645386 0.784929

2 4 6 0.581395 0.872093 2 100 145 1.744287 2.529217

3 8 14 1.162791 2.034884 3 125 270 2.180359 4.709576

4 5 19 0.726744 2.761628 4 156 426 2.721088 7.430665

5 12 31 1.744186 4.505814 5 158 584 2.755974 10.18664

6 11 42 1.598837 6.104651 6 187 771 3.261818 13.44846

7 11 53 1.598837 7.703488 7 186 957 3.244375 16.69283

8 15 68 2.180233 9.883721 8 195 1152 3.401361 20.09419

9 11 79 1.598837 11.48256 9 203 1355 3.540904 23.6351

10 15 94 2.180233 13.66279 10 215 1570 3.750218 27.38531

11 18 112 2.616279 16.27907 11 198 1768 3.453689 30.839

12 17 129 2.47093 18.75 12 187 1955 3.261818 34.10082

13 13 142 1.889535 20.63953 13 210 2165 3.663004 37.76382

14 17 159 2.47093 23.11047 14 205 2370 3.575789 41.33961

15 21 180 3.052326 26.16279 15 198 2568 3.453689 44.7933

16 27 207 3.924419 30.08721 16 204 2772 3.558346 48.35165

17 24 231 3.488372 33.57558 17 229 3001 3.994418 52.34607

18 12 243 1.744186 35.31977 18 182 3183 3.174603 55.52067

19 13 256 1.889535 37.2093 19 161 3344 2.808303 58.32897

20 13 269 1.889535 39.09884 20 184 3528 3.209489 61.53846

21 19 288 2.761628 41.86047 21 176 3704 3.069946 64.60841

22 15 303 2.180233 44.0407 22 149 3853 2.598988 67.2074

23 9 312 1.30814 45.34884 23 166 4019 2.895517 70.10291

24 28 340 4.069767 49.4186 24 155 4174 2.703646 72.80656

25 15 355 2.180233 51.59884 25 129 4303 2.250131 75.05669

26 27 382 3.924419 55.52326 26 130 4433 2.267574 77.32426

27 24 406 3.488372 59.01163 27 129 4562 2.250131 79.57439

28 20 426 2.906977 61.9186 28 112 4674 1.953602 81.528

29 25 451 3.633721 65.55233 29 88 4762 1.534973 83.06297

30 22 473 3.197674 68.75 30 103 4865 1.796616 84.85958

31 12 485 1.744186 70.49419 31 82 4947 1.430316 86.2899

32 7 492 1.017442 71.51163 32 79 5026 1.377987 87.66789

33 12 504 1.744186 73.25581 33 64 5090 1.116344 88.78423

34 18 522 2.616279 75.87209 34 64 5154 1.116344 89.90058

35 14 536 2.034884 77.90698 35 40 5194 0.697715 90.59829

36 9 545 1.30814 79.21512 36 36 5230 0.627943 91.22623

37 11 556 1.598837 80.81395 37 50 5280 0.872144 92.09838

38 10 566 1.453488 82.26744 38 47 5327 0.819815 92.91819

39 14 580 2.034884 84.30233 39 32 5359 0.558172 93.47636

40 13 593 1.889535 86.19186 40 34 5393 0.593058 94.06942

41 14 607 2.034884 88.22674 41 27 5420 0.470958 94.54038

42 7 614 1.017442 89.24419 42 35 5455 0.610501 95.15088

43 5 619 0.726744 89.97093 43 25 5480 0.436072 95.58695

44 4 623 0.581395 90.55233 44 19 5499 0.331415 95.91837

45 3 626 0.436047 90.98837 45 14 5513 0.2442 96.16257

46 4 630 0.581395 91.56977 46 23 5536 0.401186 96.56375

47 1 631 0.145349 91.71512 47 13 5549 0.226757 96.79051

48 4 635 0.581395 92.29651 48 17 5566 0.296529 97.08704

49 4 639 0.581395 92.87791 49 12 5578 0.209314 97.29635



50 1 640 0.145349 93.02326 50 8 5586 0.139543 97.4359

51 1 641 0.145349 93.1686 51 11 5597 0.191872 97.62777

52 4 645 0.581395 93.75 52 8 5605 0.139543 97.76731

53 3 648 0.436047 94.18605 53 6 5611 0.104657 97.87197

54 3 651 0.436047 94.62209 54 10 5621 0.174429 98.0464

55 4 655 0.581395 95.20349 55 5 5626 0.087214 98.13361

56 5 660 0.726744 95.93023 56 6 5632 0.104657 98.23827

57 2 662 0.290698 96.22093 57 3 5635 0.052329 98.2906

58 0 662 0 96.22093 58 4 5639 0.069771 98.36037

59 0 662 0 96.22093 59 5 5644 0.087214 98.44758

60 0 662 0 96.22093 60 4 5648 0.069771 98.51736

61 0 662 0 96.22093 61 5 5653 0.087214 98.60457

62 1 663 0.145349 96.36628 62 3 5656 0.052329 98.6569

69 1 664 0.145349 96.51163 63 4 5660 0.069771 98.72667

71 1 665 0.145349 96.65698 64 3 5663 0.052329 98.779

80 2 667 0.290698 96.94767 65 3 5666 0.052329 98.83133

82 3 670 0.436047 97.38372 66 3 5669 0.052329 98.88366

83 3 673 0.436047 97.81977 67 5 5674 0.087214 98.97087

85 3 676 0.436047 98.25581 68 0 5674 0 98.97087

87 1 677 0.145349 98.40116 69 3 5677 0.052329 99.0232

88 1 678 0.145349 98.54651 70 3 5680 0.052329 99.07553

89 1 679 0.145349 98.69186 71 1 5681 0.017443 99.09297

90 2 681 0.290698 98.98256 72 3 5684 0.052329 99.1453

91 1 682 0.145349 99.12791 73 0 5684 0 99.1453

92 1 683 0.145349 99.27326 74 3 5687 0.052329 99.19763

96 1 684 0.145349 99.4186 75 3 5690 0.052329 99.24996

113 1 685 0.145349 99.56395 76 0 5690 0 99.24996

131 1 686 0.145349 99.7093 77 5 5695 0.087214 99.33717

161 1 687 0.145349 99.85465 78 4 5699 0.069771 99.40694

NA 1 688 0.145349 100 79 4 5703 0.069771 99.47671

80 3 5706 0.052329 99.52904

81 5 5711 0.087214 99.61626

82 3 5714 0.052329 99.66859

83 0 5714 0 99.66859

84 1 5715 0.017443 99.68603

85 3 5718 0.052329 99.73836

86 1 5719 0.017443 99.7558

87 1 5720 0.017443 99.77324

88 3 5723 0.052329 99.82557

89 2 5725 0.034886 99.86046

90 2 5727 0.034886 99.89534

91 1 5728 0.017443 99.91279

92 1 5729 0.017443 99.93023

100 1 5730 0.017443 99.94767

106 1 5731 0.017443 99.96511

107 1 5732 0.017443 99.98256

148 1 5733 0.017443 100

8. CORE JOURNALS

Journals are ranked here on the base of its frequency in citations to find core journals in crop

physiology. This ranking will help in taking decision to add or remove the particular journal

in the library. Journals cited minimum 10 times are only considered in ranking. The following

table 8 is the rank list of journals cited in PhD theses of Crop Physiology in UAS Dharwad.

Plant Physiology and Crop Science journals are ranked first they have 392 citations each and

covers 6.95% of citations. Agronomy Journal and Indian Journal of Plant Physiology ranked

second


Science Dharwad


Table 8 Jounal Ranking

Sl.

No Journal Name

No. of

Citations Percentage Ranking

No. of

Journals

1 Plant Physiology 392 6.94666 1 2 5

2 Crop Science 392 6.94666 1

3 Agronomy Journal 226 4.004962 2 2

4

Indian Journal of Plant

Physiology 226 4.004962 2

5

Indian Journal of Agricultural

Science 211 3.739146 3 1

6 Madras Agricultural Journal 157 2.782208 4 1 25

7

Journal of Maharashtra

Agricultrual University 138 2.445508 5 1

8 Annals of Botany 83 1.470849 6 1

9 ActaHorticulturae 67 1.187312 7 2

10

Annual Review of Plant


11

Australian Journal of

Agricultrual Research 63 1.116427 8 2

12

Australian Journal of Plant


13 Plant and Soil 61 1.080985 9 1

14 PhysiolgiaPlantarum 60 1.063264 10 2

15 South Indian Horticulture 60 1.063264 10

16 Field Crop Research 54 0.956938 11 2

17 Indian Journal of Agronomy 54 0.956938 11

18

Mysore Journal of Agricultural

Sciences 52 0.921496 12 1

19 Legume Research 50 0.886054 13 1

20

Journal of Experimental

Botany 45 0.797448 14 1

21 Weed Science 43 0.762006 15 1

22

Journal of Agricultural and

Food Chemistry 42 0.744285 16 2

23

Indian Journal of Genetics and

Plant Breeding 42 0.744285 16

24 Annals of Plant Physiology 35 0.620237 17 1

25

Karnataka Journal of

Agricultural Science 33 0.584795 18 1

26 Current Sciecne 33 0.584795 19 1

27 Nature 30 0.531632 20 1

28

Australian Journal of

Biological Science 29 0.513911 21 3

29 Journal of Agricultural Science 29 0.513911 21

30

Journal of American Society

for Horticultural Science 29 0.513911 21

31 Agroforestry Systems 28 0.49619 22 2 72

32

Annals of Agricultural

Research 28 0.49619 22

33 Indian Journal of Horticulture 27 0.478469 23 3

34

Journal of Indian Society of

Soil Science 27 0.478469 23

35 Photosynthetica 27 0.478469 23

36 Experimental Agriculture 26 0.460748 24 2

37

Journal of Agronomy and Crop

Science 26 0.460748 24

38 Indian Journal of Genetics 25 0.443027 25 2



39 Phytochemistry 25 0.443027 25

40

Postharvest Biology and

Technology 24 0.425306 26 4

41 Andhra Agricultural Journal 24 0.425306 26

42 Cotton Development 24 0.425306 26

43 Weed Research 24 0.425306 26

44 American Journal of Botany 23 0.407585 27 1

45 Crop Research 22 0.389864 28 3

46 Indian Forester 22 0.389864 28

47

Journal of Horticultural

Science 22 0.389864 28

48

Canadian Journal of Plant

Science 21 0.372142 29 2

49 Planta 21 0.372142 29

50 Annals of Applied Biology 20 0.354421 30 2

51 HortScinece 20 0.354421 30

52 Current Research 19 0.3367 31 6

53

Indian Journal of Biochemistry

and Biophysics 19 0.3367 31

54

Journal of Australian Institute

of Agricultural Sciences 19 0.3367 31

55

Proceedings of Indian National

Science Academi 19 0.3367 31

56 Progressive Horticulture 19 0.3367 31

57

Indian Journal of Agricultural

Research 18 0.318979 32 7

58 Canadian Journal of Botany 17 0.301258 32

59

Haryana Journal of

Horticultural Sciences 17 0.301258 32

60

Journal of Economic and

Entomology 17 0.301258 32

61 Journal of Food Science 17 0.301258 32

62

Journal of Research Andhra

Pradesh Agricultural University 17 0.301258 32

63 Scientia Horticulturae 17 0.301258 32

64

Journal of Indian Society for

Cotton Improvement 16 0.283537 33 6

65 New Phytologist 16 0.283537 33

66 Pakistan Cotton 16 0.283537 33

67 Plant Growth Regulation 16 0.283537 33

68

Proceedings of Crop Science

Society of Japan 16 0.283537 33

69 Science 16 0.283537 33

70 Annals of Arid Zone 15 0.265816 34 11

71

Environment and Experimental

Botany 15 0.265816 34

72 Journal of Plant Nutrition 15 0.265816 34

73

Journal of Science of Food and

Agriculture 15 0.265816 34

74 Punjab Horticultural Journal 15 0.265816 34

75 Soybean Genetics Newsletter 15 0.265816 34

76 Horticultural Science 14 0.248095 34

77

Indian Cocoa Arecanut and

Spices Journal 14 0.248095 34

78 Indian Cotton Growing Review 14 0.248095 34

79

Journal of Food Science and

Technology 14 0.248095 34

80 Plant Cell and Environment 14 0.248095 34


Science Dharwad


81

Journal of Agricultural

Research 13 0.230374 35 3

82

Journal of Biological

Chemistry 13 0.230374 35

83

Soil Science Society of

America Proceedings 13 0.230374 35

84 Agronomy Abstract 12 0.212653 36 5

85 BiologiaPlantarium 12 0.212653 36

86

Japanese Journal of Crop

Science 12 0.212653 36

87

PunjabraoKrishiVidyapeeth

Research Journal 12 0.212653 36

88 Vegetable Science 12 0.212653 36

89 Genetics 11 0.194932 37 3

90

Theoretical and Applied

Gentetics 11 0.194932 37

91

Zeitschrift fur

Pflanzenphysiologie :

International Journal of Plant


92 Agricultural Science Digest 10 0.177211 38 11

93 Annals of Agricultural Science 10 0.177211 38

94

Communications in soil science

and plant analysis 10 0.177211 38

95 Crop Improvement 10 0.177211 38

96

Indian Journal of Pluse

Research 10 0.177211 38

97

Journal of Korean Society of

Horticultural Science 10 0.177211 38

98 Journal of Oilseed Research 10 0.177211 38

99 Journal of Soil and Crops 10 0.177211 38

100 Plant and cell Physiology 10 0.177211 38

101

Proceedings of Florida State

Horticultural Society 10 0.177211 38

102 Soil Science 10 0.177211 38

9. FINDINGS

In the present study 7498 citations from 36 theses in Crop Physiology submitted to UAS

Dharwad were analyzed . The study reveals the following findings

The highest number of PhDs awarded from the Department of Crop Physiology in UAS

Dharwad in the duration 1995-1999 & 20047-2007 i.e. 8 (22.2%). Average number of citation

per thesis found 208

Researchers cited journal articles more than other form of resources. Out of 7498 citations

5667 citations are of journal articles. The major part of citations are of Books, Proceedings

Theses and Reports. From table 2 the data proved the first hypothesis of the research that

researchers prefer most journals for their research

Publications published in the duration 1981-1990 i. e. 2216 citations are highest cited.

Publications published in the duration 1991-2000 ranked second. The data reveals that

researchers refer latest information resources.

Citations studied found multiple authored more than single authored. There are 2155 (28.4%)

citations are only single authored remaining citations are two, three, four, five,six, seven, more

than seven and corporate authors. The degree of collaboration is found in the Crop Physiology

is 0.76. The data proves the second hypothesis that collaboration is high.



Publications published from India are cited most in theses. Indian publications ranked first

.2774 citations 36.9% of total citations are cited in doctoral dissertations of Crop Physiology,

The Publications from USA and UK are ranked second and third respectively ie 2102 citations

( 28.03%) and 641 (8.52%).. This proves the third hypothesis of the study that researchers

cited Indian publications more than of other countries

It is found from study that half-life for books publication is 25 years and after 35 year books

will become obsolete in crop Physiology. Half-life for journals in Crop Physiology is 16 years

and after 25 years journals will be obsolete.

Journal rank list is prepared based the frequency of appearance in the citations of doctoral

dissertations. Plant Physiology & Crop Science of USA are ranked first. Agronomy journal of

USA and Indian Journal of plant physiology ranked second.

10. CONCLUSIONS

Citation analysis of dissertations and assignments of students will help to know the

information seeking behavior of students. The data is very helpful in making decision in

collection management of the library. The obsolete literature can be weeded to make space for

recent required literature. Journal ranking based on the citations in dissertations can be

considered in subscription of journals for the library. The growing rate of information

resources and limited budget, Librarian must be selective for information resources which are

useful and needed for his/her user community. The citation analysis is very helpful tool in

making decisions in selecting or rejecting information resources for the library. The present

study is an attempt to seek the information need of the Crop Physiology researchers in

University of Agricultural Sciences Dharwad.

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citation analysis of ph. d theses in crop …crop physiology is a branch of agricultural sciences...

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