Ryoichi Doi

463 total citations
45 papers, 369 citations indexed

About

Ryoichi Doi is a scholar working on Ecology, Plant Science and Soil Science. According to data from OpenAlex, Ryoichi Doi has authored 45 papers receiving a total of 369 indexed citations (citations by other indexed papers that have themselves been cited), including 15 papers in Ecology, 15 papers in Plant Science and 13 papers in Soil Science. Recurrent topics in Ryoichi Doi's work include Remote Sensing in Agriculture (12 papers), Soil Carbon and Nitrogen Dynamics (9 papers) and Leaf Properties and Growth Measurement (5 papers). Ryoichi Doi is often cited by papers focused on Remote Sensing in Agriculture (12 papers), Soil Carbon and Nitrogen Dynamics (9 papers) and Leaf Properties and Growth Measurement (5 papers). Ryoichi Doi collaborates with scholars based in Japan, Thailand and Indonesia. Ryoichi Doi's co-authors include S. L. Ranamukhaarachchi, Masaru Mizoguchi, Chusnul Arif, Katsutoshi Sakurai, Budi Indra Setiawan, Tadashi Yoshikawa, Jun Sawai, Hirotaka Kojima, Takashi Ozawa and Hiromitsu Kojima and has published in prestigious journals such as Environmental Research Letters, Environmental Monitoring and Assessment and Journal of Industrial Microbiology & Biotechnology.

In The Last Decade

Ryoichi Doi

43 papers receiving 342 citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
Ryoichi Doi Japan 11 129 95 79 53 53 45 369
Manyowa N. Meki United States 13 128 1.0× 127 1.3× 52 0.7× 32 0.6× 53 1.0× 28 405
Daniel Garbellini Duft Brazil 10 171 1.3× 30 0.3× 159 2.0× 105 2.0× 46 0.9× 22 333
Domingos Guilherme Pellegrino Cerri Brazil 8 106 0.8× 61 0.6× 72 0.9× 83 1.6× 14 0.3× 15 295
Tommaso Stella Italy 15 292 2.3× 112 1.2× 145 1.8× 37 0.7× 130 2.5× 21 560
Xi Liang United States 12 277 2.1× 128 1.3× 37 0.5× 42 0.8× 49 0.9× 34 435
Xiquan Li China 11 72 0.6× 131 1.4× 76 1.0× 18 0.3× 88 1.7× 33 452
Anderson Prates Coelho Brazil 11 235 1.8× 167 1.8× 50 0.6× 38 0.7× 29 0.5× 84 383
Josh Lofton United States 11 306 2.4× 99 1.0× 110 1.4× 99 1.9× 21 0.4× 35 458
Cong Hu China 16 120 0.9× 84 0.9× 140 1.8× 23 0.4× 51 1.0× 73 586

Countries citing papers authored by Ryoichi Doi

Since Specialization
Citations

This map shows the geographic impact of Ryoichi Doi's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Ryoichi Doi with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Ryoichi Doi more than expected).

Fields of papers citing papers by Ryoichi Doi

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Ryoichi Doi. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Ryoichi Doi. The network helps show where Ryoichi Doi may publish in the future.

Co-authorship network of co-authors of Ryoichi Doi

This figure shows the co-authorship network connecting the top 25 collaborators of Ryoichi Doi. A scholar is included among the top collaborators of Ryoichi Doi based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Ryoichi Doi. Ryoichi Doi is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Doi, Ryoichi. (2021). Hue‐shifting for accurate and precise quantification of biochemical substances using diagnostic test strips. Coloration Technology. 137(5). 530–543. 1 indexed citations
2.
Doi, Ryoichi, et al.. (2017). Quasi-Real-Time Monitoring of a Citrus Field in Nabeul and Joumine Dam in Tunisia. 1(3). 84–89. 1 indexed citations
3.
Doi, Ryoichi, Chusnul Arif, Budi Setiawan, & Masaru Mizoguchi. (2014). Pixel Color Clustering of Multi-Temporally Acquired Digital Photographs of a Rice Canopy by Luminosity-Normalization and Pseudo-Red-Green-Blue Color Imaging. The Scientific World JOURNAL. 2014. 1–9. 5 indexed citations
4.
Doi, Ryoichi, Chusnul Arif, Budi Setiawan, & Masaru Mizoguchi. (2013). Quantitative Use of Luminosity-normalized Grayscale Images of Greenness, Redness and Yellowness of a Rice Canopy Derived from Multi-temporally Acquired Digital Photographs. International Journal of Agriculture and Biology. 15(4). 707–712. 4 indexed citations
5.
Doi, Ryoichi & S. L. Ranamukhaarachchi. (2013). Soil dehydrogenase in a land degradation-rehabilitation gradient: observations from a savanna site with a wet/dry seasonal cycle. Revista de Biología Tropical. 57(1-2). 223–34. 24 indexed citations
6.
Doi, Ryoichi, et al.. (2013). Quasi-Real-Time Monitoring of a Citrus Field in Nabeul and Joumine Dam in Tunisia.. 1(3). 84–89. 1 indexed citations
7.
8.
Doi, Ryoichi. (2012). Quantification of leaf greenness and leaf spectral profile in plant diagnosis using an optical scanner. Ciência e Agrotecnologia. 36(3). 309–317. 7 indexed citations
9.
Arif, Chusnul, Masaru Mizoguchi, & Ryoichi Doi. (2012). Estimation of soil moisture in paddy field using Artificial Neural Networks. International Journal of Advanced Computer Science and Applications. 1(1). 37 indexed citations
10.
Doi, Ryoichi & S. L. Ranamukhaarachchi. (2010). Discriminating between canopies of natural forest and Acacia plantation plots in a Google Earth image to evaluate forest land rehabilitation by Acacia species.. International Journal of Agriculture and Biology. 12(6). 921–925. 7 indexed citations
11.
Doi, Ryoichi, et al.. (2009). Semiquantitative color profiling of soils over a land degradation gradient in Sakaerat, Thailand. Environmental Monitoring and Assessment. 170(1-4). 301–309. 16 indexed citations
12.
Doi, Ryoichi & S. L. Ranamukhaarachchi. (2009). Correlations between soil microbial and physicochemical variations in a rice paddy: implications for assessing soil health. Journal of Biosciences. 34(6). 969–976. 23 indexed citations
13.
Ishida, Kazunari, Hiroyuki Fujioka, & Ryoichi Doi. (2006). ACUTE RUPTURE OF EXTENSOR POLLICIS LONGUS TENDON DUE TO AVULSED FRACTURE OF THE SECOND METACARPAL BASE: A CASE REPORT. Hand Surgery. 11(01n02). 43–45. 7 indexed citations
14.
Lee, Sang Yang, Nobuzo Matsui, Kazuya Yoshida, et al.. (2005). Magnetic resonance delineation of the anterior cruciate ligament of the knee. Clinical Imaging. 29(2). 117–122. 9 indexed citations
15.
Doi, Ryoichi. (2005). Effects of air-drying soils on discriminating the soils with community-level physiological profiling. The Journal of General and Applied Microbiology. 51(6). 379–383. 3 indexed citations
16.
17.
Sawai, Jun, et al.. (2002). Indirect conductimetric assay of antibacterial activities. Journal of Industrial Microbiology & Biotechnology. 29(5). 296–298. 27 indexed citations
18.
Doi, Ryoichi. (2001). Vegetational response of rainfall in Rajasthan using AVHRR imagery. Journal of the Indian Society of Remote Sensing. 29(4). 213–224. 6 indexed citations
19.
Ozawa, Takashi & Ryoichi Doi. (1996). Increase in the Competitive Nodulation Ability of Bradyrhizobium japonicum Strains Grown in Purified Water.. Microbes and Environments. 11(3). 87–90. 5 indexed citations
20.
Ozawa, Takashi, Hiroshi Ogata, Ryoichi Doi, & Yutaka Komai. (1992). Isolation of transposon Tn5-induced hydrophobic mutants of aBradyrhizohium japonicumstrain with improved competitive nodulation abilities. Soil Science & Plant Nutrition. 38(3). 545–552. 2 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

Explore authors with similar magnitude of impact

Breakdown of academic impact, for papers by Manyowa N. Meki Breakdown of academic impact, for papers by Daniel Garbellini Duft Breakdown of academic impact, for papers by Domingos Guilherme Pellegrino Cerri Breakdown of academic impact, for papers by Tommaso Stella Breakdown of academic impact, for papers by Xi Liang Breakdown of academic impact, for papers by Xiquan Li Breakdown of academic impact, for papers by Anderson Prates Coelho Breakdown of academic impact, for papers by Josh Lofton Breakdown of academic impact, for papers by Cong Hu
Rankless by CCL
2026