Social sciences 104 Research 83 Computer science 81 Plant Biotechnology 78 Statistics 65 Dissertations, Academic (Ph.D) 51 Methodology 50 History 49 R (Computer program language) 47 Economics 46 Biotechnology 44 Agriculture 43 Data processing 40 Education 32 Agronomy 31 Data mining 31 Mathematics 31 methods 31 Qualitative research 30 Management 29 Plant Biotechnology and Molecular Biology 29 Agricultural Entomology 28 Philosophy 27 Plant Pathology 27 Plant Breeding and Genetics 26 Computer programs 25 Java (Computer program language) 25 Statistical methods 25 Agricultural Extension 24 Mathematical statistics 23