History 157 Literature 137 Reading 108 Seed science 89 Books and reading 81 Weed Science 66 Philosophy 61 Agronomy 58 Novel 58 Social Sciences 58 History and criticism 57 Animal nutrition 56 Dissertations, Academic (Ph.D) 56 Congresses 55 Nutrition 55 Religion 55 Weed control 54 Economics 49 Weeds 48 Seeds 45 Weed management 44 Criticism 43 India 43 Biography 41 Hinduism 41 Animal Nutrition 40 Education 40 Seed production 40 Women 40 Sociology 39