agronomy Editorial Worldwide Trends in Agronomy Research: Bibliometric Studies Esther Salmerón-Manzano 1 and Francisco Manzano-Agugliaro 2, *   Citation: Salmerón-Manzano, E.; Manzano-Agugliaro, F. Worldwide Trends in Agronomy Research: Bibliometric Studies. Agronomy 2021, 11, 1993. https://doi.org/10.3390/ agronomy11101993 Received: 10 September 2021 Accepted: 24 September 2021 Published: 1 October 2021 Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affil- iations. Copyright: © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https:// creativecommons.org/licenses/by/ 4.0/). 1 Faculty of Law, Universidad Internacional de La Rioja (UNIR), Av. de la Paz, 137, 26006 Logroño, Spain; esther.salmeron@unir.net 2 Department of Engineering, CEIA3, University of Almeria, 04120 Almeria, Spain * Correspondence: fmanzano@ual.es; Tel.: +34-950-015-346; Fax: +34-950-015-491 Abstract: Agriculture has the large challenge of providing food for a continuously growing world population, while natural resources remain the same. This great challenge is certainly supported in the future by Agronomy, which brings together practical knowledge and scientifically based techniques and applies them to agricultural productivity. Research in agronomy at a global level must reflect global interests, while considering the particular conditions of each country or region. One of the main objectives of this Special Issue is to contribute studies that help to identify the global research trends in agronomy, especially if they have an approach related to sustainability. Keywords: agronomy; patents; scopus; sustainability; precision agriculture; coffee; ozone; environment; health; agroforestry; bibliometrics; berry growers; artificial intelligence; agriculture; robots; farming automation; economy; irrigation 1. Introduction Agriculture is the world’s most pressing and responsible sector, given that seven billion people must eat every day. To achieve this, there are the following three priority issues: health, variety, and quantity. Agriculture, therefore, is the cultivation of land or the production of crops from the soil, but its main science of study is agronomy. Agronomy can be understood as the field of science that oversees organizing the knowledge of various applied sciences, focused on enhancing the quality of production processes and the transformation of agricultural products. Globally, food security is at risk, and for this reason, agronomy must achieve agri- cultural sustainability on Earth. In summary, Agronomy should contribute to improve the efficiency in the use of resources for food production. One of the main objectives of this Special Issue is to contribute studies that help to identify the global research trends in agronomy, especially if they have an approach related to sustainability. Therefore, articles reviewing this state of the art in any of these issues, bibliometric or scientometric studies, and research articles with a global perspective are welcome. These studies are recommended to identify the research trends in each scientific field related to agronomy and, if possible, identify the open challenges in that particular field of study. 2. Publications Statistics The summary of the call for papers for this Special Issue on the 12 manuscripts submitted is as follows: three rejected (25%) and nine published (75%). The submitted manuscripts come from seven countries and are summarized in Table 1. For this statistic, only the first affiliation of the authors has been considered, in which it gives us the opportunity to observe 37 authors from 7 countries. Note that it is common for a manuscript to be signed by more than one author and for authors to belong to different affiliations. The average number of authors per published manuscript in this Special Issue was four authors. Agronomy 2021, 11, 1993. https://doi.org/10.3390/agronomy11101993 https://www.mdpi.com/journal/agronomy