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To clarify the current situation, hotspots, and development trends in the field of rice and climate change topic research, a massive literature dataset were analyzed from the Web of Science database by bibliometric method. The research theme was chosen given the continuous increase of studies related to climatic changes and their consequences to rice. Based on the Web of Science core database, this study analyzed 4170 papers in the field of rice and climate change topic research from 1990 to July 2022, which include 86 highly cited papers and 3 hot papers. Papers were mainly written in English (4157, 99.688%), from 16,363 authors, 4017 organizations, and 129 countries/territories, published in 841 journals and seven book series. The top five Journals are Science of the Total Environment (136, 3.261%), Sustainability (89, 2.134%), Agronomy Basel (81, 1.942%), Agricultural and Forest Meteorology (77, 1.847%), and Climatic Change (74, 1.775%), each published more than 74 papers. Top five countries and regions of People's Republic of China, the USA, India, Australia, and Japan were the major article contributors, each published more than 360 papers. Top five organizations of Chinese Acad Sci, Nanjing Agr Univ, Univ Chinese Acad Sci, Chinese Acad Agr Sci, and Int Rice Res Inst (IRRI) were popular based on contribution of articles more than 133 papers each. Among the all authors, top five authors were Tao Fulu, Pan Genxing, Zhang Zhao, Hasegawa Toshihiro, and Iizumi Toshichika, each published more than thirty papers. All keywords were separated into eight clusters for different research topics. Visualizations offer exploratory information on the current state in a scientific field or discipline as well as indicate possible developments in the future. The results will help researchers clarify the current situation in rice and climate change adaptation science but also provide guidance for future research. This work is also useful for student identifying graduate schools and researchers selecting journals. [ABSTRACT FROM AUTHOR]

Bibliometric analysis is a quantitative evaluation method for scientific research aimed at measuring knowledge expressed as scientific publications in a given field. Based on the Essential Science Indicators database, 1136 top papers on cultivated wheat (Triticum species) were researched from 2010 to 2020, including 1132 highly cited papers and 20 'hot' papers. All papers written in English were from 5563 authors, 1668 organizations and 91 countries/territories, published in 317 journals and book series. The top five journals were Frontiers in Plant Science (50, 4.4%), Journal of Experimental Botany (38, 3.3%), New Phytologist (26, 2.3%), Bioresource Technology (25, 2.2%) and Field Crops Research (24, 2.1%), each publishing more than 24 papers. The five countries publishing the most papers were USA, People's R China, Australia, England and Germany. The top five organizations were Chinese Academy of Science, Chinese Academy of Agricultural Science (CAAS), USDA Agricultural Research Service (ARS), CIMMYT, and CSIRO Agriculture and Food which each contributed more than 22 papers. Among authors, the top six were Rizwan, Muhammad; Ali, Shafaqat; Reynolds, Matthew; Gao, Caixia; Wang, Yanpeng; and Uauy, Cristobal, with each publishing more than eight papers. All keywords were separated into seven clusters representing different research topics. Visualizations offer exploratory information on current status in a scientific field or discipline as well as indicate possible future directions. This work will be useful for students in identifying graduate schools and researchers in selecting journals. [ABSTRACT FROM AUTHOR]

Potato (Solanum tuberosum L.) has been recognized as the fourth largest crop after maize, wheat and rice and is a crop of importance in developing countries for ensuring human nutrition and food security. Based on the Web of Science, this study analysed 3943 article- and review-type papers of potato research from agronomy category during 2000 to 2021 and included 6 highly cited papers. The papers mainly written in English (96.88%) were from 11,479 authors, 120 countries/territories and 2719 organizations and published in 97 journals and one book series. The top 5 core journals were American Journal of Potato Research (949, 24.07%), Potato Research (437, 11.08%), European Journal of Plant Pathology (172, 4.36%), Plant Pathology (171, 4.34%) and Theoretical and Applied Genetics (142, 3.60%). The top 5 countries and regions were the USA, Canada, China, the Netherlands and Brazil. The top five organizations were USDA ARS, Agriculture and Agri-Food Canada, University of Wisconsin, Wageningen University and Research Centre and University of Idaho, each with more than 157 papers. The top 6 authors were C. R. Brown, R. G. Novy, J. B. Bamberg, R. G. F. Visser, K. G. Haynes and P. C. Struik, each publishing more than 43 papers. All keywords of the potato research from agronomy category were separated into seven clusters for different research topics. Visualizations offered exploratory information on the current state in a scientific field or discipline as well as indicating possible developments in the future. This work is useful for students identifying graduate schools and for researchers selecting journals. [ABSTRACT FROM AUTHOR]

A field experiment comparing different irrigation frequencies and soil matric potential thresholds on potato evapotranspiration (ET), yield (Y) and water-use efficiency (WUE) was carried out in a loam soil. The experiment included five treatments for soil matric potential: F1 (-15 kPa), F2 (-25 kPa), F3 (-35 kPa), F4 (-45 kPa) and F5 (-55 kPa) and six treatments for irrigation frequency: N1 (once every day), N2 (once every 2 days), N3 (once every 3 days), N4 (once every 4 days), N6 (once every 6 days) and N8 (once every 8 days). Results indicate that both soil matric potential and drip irrigation frequency influenced potato ET,Yand WUE. Potato ET increased as irrigation frequency and soil matric potential increased. Comparing soil water potential, the highest ET was 63.4 mm (32.1%) more than the lowest value. Based on irrigation frequency treatments, the highest ET was 36.7 mm (19.2%) more than the lowest value. PotatoYand WUE were also found to increase as irrigation frequency increased. PotatoYincreased with an increase in soil water potential then started to decrease. The highestYand WUE values were achieved with a soil matric potential threshold of -25 kPa and an irrigation frequency of once a day. [ABSTRACT FROM AUTHOR]

During the last two decades, energy-saving solar greenhouses without heating systems, about 150–800 m2 (width: 5–10 m, length: 30–80 m) in size, have been widely used in the North of China for vegetable production during cold seasons. The greenhouse is also suitable for use in other countries located in the temperate or warm-temperate zones, especially in the developing countries, because it is inexpensive with a simple structure, and does not need any additional energy for heating in winter. Drip irrigation has been recognized as a sensible method of supplying water inside the greenhouses, and a simple method for drip irrigation scheduling at low cost is urgently required. Using the water-balance method, the authors studied the water consumption of tomato ( Lycopersicon esculentum Mill.) and the relationship between evapotranspiration and water surface evaporation measured with 20 cm pan. Research results show that there is no significant water flux at 0.75 m depth when soil water potential is kept higher than –20 kPa at 15 cm depth, and around –20 kPa at 60 cm depth. The accumulative value of evapotranspiration is approximately equal to the accumulative value of water surface evaporation measured using 20 cm pan. Further analysis found that 20 cm pan can be used to determine the water requirement of tomato drip irrigation scheduling in this type of greenhouse. [ABSTRACT FROM AUTHOR]

Based on the design methods of finite elements and golden-section searches, a method was developed for designing microirrigation laterals at minimum cost. Characteristics of water application uniformity as affected by lateral diameters and lengths were analyzed. When the required average emitter discharge is known, the relationships of water application uniformity, best submain position (paired laterals), and operating pressure head as a function of the lateral diameter and length can be accurately determined using a personal computer. The lateral diameter and length can then be determined from a contour map representing water application uniformity as a function of the lateral diameter and length (computer calculation). The best submain position and operating pressure head for this lateral diameter and length is then determined by computer calculation. This method is suitable for designing microirrigation laterals on both uniformly and nonuniformly sloping fields. [ABSTRACT FROM AUTHOR]