Rigorous peer-reviews are the basis of high-quality academic publishing. Thanks to the great efforts of our reviewers, Soil Systems was able to maintain its standards for the high quality of its published papers. Thanks to the contribution of our reviewers, in 2021, the median time to first decision was 27 days and the median time to publication was 49 days. The editors would like to extend their gratitude and recognition to the following reviewers for their precious time and dedication, regardless of whether the papers they reviewed were finally published:
| Abreu-Junior, Cassio Hamilton | Littke, Kim |
| Álvaro, José Javier | Liu, Chunli |
| Anderson, Anne | Liu, Haojie |
| Antonucci, Angela | Lo Monaco, Angela |
| Arriaga, Francisco | Lo Presti, Emilio |
| Badagliacca, Giuseppe | López, Roberto |
| Bao, Yuhai | MaŁek, Stanisław |
| Barcellos, Diego | Mangiameli, Michele |
| Battigelli, Jeff | Manyevere, Alen |
| Bell, Doug | Martínez, Emilio Pascual |
| Bhat, Sartaj Ahmad | Mazzei, Pierluigi |
| Borges, Alisson | McCarthy, Lynda H. |
| Borowiak, Klaudia-Anna | McGonigle, Terence P. |
| Brennensthul, Marek | Medina, Jorge |
| Bukalo, Nenita | Mohammadi-Aragh, Maryam K. |
| Büks, Frederick | Mongil-Manso, Jorge |
| Bulgariu, Laura | Mroczek, Przemyslaw |
| Burlakovs, Juris | Mucha, Joanna |
| Chapman, Katy | Mulder, Ines |
| Chavez Vergara, Bruno Manuel | Muráth, Szabolcs |
| Choi, Nag-Choul | Nakamura, Kengo |
| Ci, En | Nandi, Arpita |
| Coblinski, João | Navathe, Sudhir |
| Comeau, Phillip | Nishigaki, Tomohiro |
| Danish, Subhan | Norgrove, Lindsey |
| Debaene, Guillaume | Ntoulas, Nikolaos |
| Dębicka, Magdalena | Oda, Tomoki |
| Dergacheva, Maria | Oh, Dongyeop X. |
| Dessureault-Rompré, Jacynthe | Ohkama-Ohtsu, Naoko |
| Devitt, Dale | Olarieta Alberdi, José Ramón |
| Dietrich, Sebastian | Oliveira, Ana Luisa Garcia |
| Ding, Hu | Omine, Kiyoshi |
| Döring, Thomas | Pączka, Grzegorz |
| Durowoju, Olatunde S. | Pallud, Céline |
| Dynowski, Piotr | Parhizkar, Misagh |
| Fernández Rodríguez, Damián | Pat-Espadas, Aurora M. |
| Fernando, Eustace Y. | Pawlik, Małgorzata |
| Ferraz, Gabriel A. E. S. | Pent, Gabriel J. |
| Feudis, Mauro De | Pereira, José |
| Fonseca, Felícia | Pérez-Cabello, Fernando |
| Foust, Richard D. | Petry, Mirta |
| Furmańczyk, Ewa M. | Pietr, Stanisław |
| Galeone, Ciro | Radcliffe, John |
| Garau, Matteo | Rajfur, Małgorzata |
| Ghosh, Malini | Rashid, Muhammad |
| Gil-Solsona, Rubén | Rayns, Francis |
| Glatzel, Stephan | Ricchiuti, Claudia |
| Gonnelli, Christina | Rice, James |
| Gordon, Phoebe | Rivera Huerta, Hiram |
| Goswami, Omanjana | Rodriguez-Seijo, Andres |
| Guarino, Francesco | Roh, Changhyun |
| Guerra, Antonio | Roman, Kamil Krzysztof |
| Gupta, Naveen | Sadeghalvad, Bahareh |
| Gurdak, Radoslaw | Santorufo, Lucia |
| Gusiatin, Zygmunt Mariusz | Saraiva, João Pedro |
| Hajduk, Edmund | Shen, Jianxun |
| Hall Barbosa, Carlos Roberto | Shibistova, Olga |
| Haraguchi, Akira | Shtober, Nurit |
| Harrison, Sam | Sławski, Marek |
| Heberling, Frank | Smith, Erin |
| Hikouei, Iman Salehi | Smolka-Danielowska, Danuta |
| Hobara, Satoru | Stępień, Łukasz |
| Hoffmann, Lucia Vieira | Sullivan, Jessica |
| Hua, Jianfeng | Tajchman, Katarzyna |
| Huang, Guangwei | Tajovský, Karel |
| Husein, Hussam Hag | Talei, Amin |
| Iakimenko, Olga | Tanaka, Masato |
| Igual, José Mariano | Tchórzewska, Dorota |
| Islam, Tofazzal | Tedeschi, Anna |
| Jiménez-Morillo, Nicasio Tomás | Tender, Caroline De |
| Jordana, Rafael | Thorpe, Clare |
| Julich, Dorit | Todd, Timothy C. |
| Karim, M. | Tórz, Agnieszka |
| Kelepertzis, Efstratios | Trenti, Massimiliano |
| Khan, Nafees A. | Tsai, Chen-Chi |
| Kim, Min-Suk | Ukalska-Jaruga, Aleksandra |
| Klages, Susanne | Vagnon, Federico |
| Kolesnikov, Sergey Ilyich | Vayssade, Jehan-Antoine |
| Komissarov, Mikhail | Vidican, Roxana |
| Korzeniowska, Joanna | Walkiewicz, Anna |
| Kozera, Wojciech | Wang, Lei |
| Kravets, Volodymyyr | Wang, Shaofeng |
| Krzywinski, Knut | White, David |
| Kuroda, Kyohei | Wilson, Brian |
| Kwiatkowski, Cezary A. | Wyatt, Briana |
| Laval-Gilly, Philippe | Yamaguchi, Noriko |
| Lewis, Kathy | Yang, Kai |
| Li, Xiong | Zaborowska, Magdalena |
| Li, Yingbin | Zinkevičienė, Raimonda |
| Lisetskii, Fedor |
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