Seeking and maintaining high editorial standards of scientific manuscripts is an important responsibility. This task can be accomplished only with the advice and input from a large number of colleagues who are invited to review submitted papers. Their critical comments and helpful suggestions have played a major role in making Vadose Zone Journal a success. Members of the VZJ Editorial Board want to express their appreciation to the following individuals who helped review manuscripts in 2019. We extend our apologies and thanks to any reviewer whose name may have been inadvertently omitted from this list.

• Abolt, Charles, Univ. of Texas, Austin

• Abou Najm, Majdi, American Univ. of Beirut

• Akin, Idil, Washington State Univ. College of Arts and Sciences, Pullman

• Alizad, Karim, Univ. of South Carolina, Columbia

• Alves Rodrigues Pinheiro, Everton, Univ. of São Paulo, Brazil

• Angulo‐Jaramillo, Rafael, CNRS, Vaulx‐en‐Velin, France

• Arbat, Gerard, Univ. de Girona, Spain

• Auken, Esben, Aarhus, Denmark

• Awal, Ripendra, Prairie View A&M Univ., TX

• Ayankojo, Ibukun, Univ. of Florida, Immokalee

• Babaeian, Ebrahim, Univ. of Arizona, Tuscson

• Baez, María Estrella, Univ. de Chile, Santiago

• Bahmani, Omid, Bu Ali Sina Univ., Hamedan, Iran

• Bai, Yulong

• Bao, Jiuwen, Dalian Univ. of Technology, China

• Bauer‐Gottwein, Peter, Technical Univ. of Denmark, Lyngby

• Berardi, Marco, Bari, Italy

• Berg, Aaron, Univ. of Guelph, Guelph, ON, Canada

• Berli, Markus, Desert Research Institute, Las Vegas, NV

• Binley, Andrew, Lancaster Univ., UK

• Biscaro, Andre, Univ. of California Agriculture and National Resources Research and Extension Centers, Ventura, CA

• Bogena, Heye, Forschungszentrum Jülich, Germany

• Bosch, David, USDA, Tifton, GA

• Bottcher, Jurgen

• Botula Manyala, Yves‐Dady, Univ. du Québec en Abitibi‐Témiscamingue, Rouyn‐Noranda, QC, Canada

• Bradford, Scott, Riverside,CA

• Brax, Mathilde, Universitat Koblenz‐Landau, Koblenz, Germany

• Cahn, Michael

• Cai, Gaochao Forschungszentrum Jülich, JGermany

• Caldwell, Todd, USGS Pacific Region, Carson City, NV

• Carrigan, Charles, Lawrence Livermore National Laboratory, Livermore, CA

• Castaldi, Paolo, Univ. of Bologna, Italy

• Castiglione, Paolo

• Cey, Edwin, Univ. of Calgary, AB, Canada

• Chen, Chong, China Agricultural Univ., Beijing

• Chen, Hongsong, Chinese Academy of Science, Changsha, China

• Cherubini, Claudia, Universita degli Studi di Ferrara, Italy

• Choo, Jinhyun, Univ. of Hong Kong

• Clough, Timoth, Lincoln Univ., Canterbury, New Zealand

• Colliander, Andreas, NASA Jet Propulsion Lab., Pasadena, CA

• Colombani, Nicolò, Univ. Politecnica delle Marche, Ancona, Italy

• Dafflon, Baptiste

• Dahlke, Helen, Univ. of California Davis, CA

• de Rooij, Gerrit, Helmholtz Centre for Environmental Research–UFZ, Halle (Saale), Germany

• Deb, Sanjit, Texas Tech Univ., Lubbock

• Dessureault‐Rompré, Jacynthe, Univ. Laval Faculte des sciences de l'agriculture et de l'alimentation, Laval, QC, Canada

• Di Prima, Simone, Univ. degli Studi di Sassari Dipartimento di Agraria, Sassari, Italy

• Dragila, Maria, Oregon State Univ., Corvallis

• Ebrahimi, Ali, Eidgenossische Technische Hochschule Departement Umweltsystemwissenschaften, Zurich, Switzerland

• Eng Choon, Leong, Nanyang Technological Univ., Singapore

• Eriksen, Fredrik, Oslo, Norway

• Evett, Steven, USDA‐ARS, Bushland, TX

• Falta, Ron

• Fang, Qian, China Univ. of Geosciences, Wuhan, China

• Fank, Johann, JR‐AquaConSol, Graz, Austria

• Ferre, Paul A, Univ. of Arizona, Tucson

• Feyereisen, Gary, USDA‐ARS, St. Paul, MN

• Filipović, Vilim, Univ. of Zagreb, Croatia

• Flerchinger, Gerald, USDA‐ARS, Boise, ID

• Franz, Trenton, Univ. Nebraska–Lincoln

• French, Helen K., Norwegian Univ. of Life Sciences, Aas, Norway

• Fu, Qiuping, Guelph, ON, Canada

• Fujimaki, Haruyuki, Tottori, Japan

• Furman, Alex, Technion Israel Institute of Technology, Haifa

• Gage, Daniel J., Univ. of Connecticut, Storrs

• García Marín, Amanda Penélope, Univ. of Cordoba, Spain

• Garré, Sarah, Univ. de Liège, Belgium

• Gautam, Sagar, Argonne National Lab., IL

• Geistlinger, Helmut, Helmholtz Centre for Environmental Research, Halle, Germany

• Genty, Alain, CEA, Saclay, France

• Gerke, Horst, Leibniz Centre for Agricultural Landscape Research, Müncheberg, Germany

• Germann, Peter, Univ. of Bern, Bolligen, Switzerland

• Ghanbarian, Behzad, Univ. of Texas Austin

• Ghannam, Khaled, Princeton Univ., NJ

• Graf, Thomas, Leibniz Univ., Hannover, Germany

• Grathwohl, Peter, Tuebingen,Germany

• Green, Christopher, USGS, Menlo Park, CA

• Grombacher, Denys, Aarhus Univ., Denmark

• Guillon, Sophie, Mines ParisTech Centre de geosciences, Fontainebleau, France

• Gulliver, John, Univ. of Minnesota, Minneapolis

• Guo, Yuanming, Arizona State Univ., Tempe

• Haendel, Falk, Dresden, Germany

• Haghverdi, Amir, Univ. of California, Riverside

• Hamamoto, Shoichiro, Univ. of Tokyo

• Hashem, Ahmed, Arkansas State Univ., Jonesboro

• He, XiaoHui, Zhengzhou Univ., Zhengzhou, China

• Heitman, Joshua, North Carolina State Univ., Raleigh

• Helgason, Warren, Univ. of Saskatchewan, Saskatoon, SK, Canada

• Henine, Irstea, Antony, France

• Herbert, Christoph, UPC Campus Nord, Barcelona, Spain

• Hermans, Thomas

• Heuvelink, Gerard, Wageningen Univ., the Netherlands

• Holden, Joseph

• Hu, Wei, New Zealand Institute for Plant and Food Research, Christchurch, New Zealand

• Huang, Chunlin, Chinese Academy of Science, Lanzhou, China

• Huang, Jingyi, Univ. of Wisconsin–Madison

• Huang, Junqi, USEPA

• Huang, Lai‐Ming, Chinese Academy of Sciences, Beijing

• Huisman, Sander, Forschungszentrum Jülich, Germany

• Iden, Sascha, Braunschweig Technical Univ., Germany

• Imhoff, Paul, Univ. of Delaware, Newark

• Irons, Trevor, Univ. of Utah, Salt Lake City

• Irving, James

• Iversen, Bo Vangsø, Aarhus Univ., Tjele, Denmark

• Jacques, Diederik, Studiecentrum voor Kernenergie, Mol, Belgium

• Jarvis, Nicholas, SLU, Uppsala, Sweden

• Jazayeri, Sajad, Univ. of South Florida, Tampa

• Jones, Scott, Utah State Univ., Logan

• Jorda, Helena, KU Leuven, Belgium

• Jougnot, Damien, UPMC, Paris

• Judy, Jonathan, Univ. of Florida, Gainesville

• Kaiser, Michael, Lincoln, NE

• Kamai, Tamir, Agricultural Research Organization (ARO), Bet‐Dagan, Israel

• Karimifard, Shahab, Univ. of Nebraska‐Lincoln

• Kelkar, Sharad, HydroGeoLogic, Reston, VA

• Keller, Jason, GeoSystems Analysis, Hood River, OR

• Klenk, Patrick, Oberpfaffenhofen, Germany

• Knighton, James

• Koestel, John, Uppsala, Sweden

• Kolassa, J., Univ Space Research Association, Greenbelt, MD

• Kordilla, Jannes, Univ. of Goettingen, Goettingen, Germany

• Kumaragamage, Darshani, Univ. of Winnipeg, MB, Canada

• Lafond, Jonathan, Laval Univ., Quebec, QC, Canada

• Lakshmi, Venkat, Univ. of Virginia, Charlottesville, VA

• Lange, Jens, Univ. of Freiburg, Germany

• Larsbo, Mats, Swedish Univ. of Agricultural Sciences, Uppsala, Sweden

• Lehmann, Peter, ETH Zurich, Switzerland

• Levy, Guy

• Li, Jianwei, Tennessee State Univ., Nashville

• Li, Yusong, Univ. of Nebraska‐Lincoln

• Li, Zhen, Colorado School of Mines, Golden

• Likos, William, Madison, WI

• Liu, Chuyang, Univ. of Nebraska‐Lincoln

• Liu, Shaomin, Beijing Normal Univ.

• Ludwig, Bernard, Witzenhausen, Germany

• Létourneau, Guillaume, Laval Univ., Quebec, QC, Canada

• Ma, Xiaoyi, Yangling, China

• Mahabadi, Nariman

• Mamedov, Amrakh, USDA‐ARS, Manhattan, KS

• Mansfeldt, Tim, Univ. of Köln, Germany

• Martini, Edoardo, Helmholtz Centre for Environmental Research, Leipzig, Germany

• Mary, Benjamin, UNIPD, Padova, Italy

• Matyka, Maciej

• Mau, Yair

• McCarter, Colin, Univ. of Toronto, Scarborough, ON, Canada

• Michel, Jean‐Charles, AGROCAMPUS OUEST ‐ Centre d'Angers, Angers, France

• Mike, Müller‐Petke, Leibniz‐Institut fur Angewandte Geophysik, Hannover, Germany

• Minasny, Budiman, Univ. of Sydney, Sydney, NSW, Australia

• Minsley, Burke

• Mishra, Umakant, Argonne National Lab., IL

• Mohanty, Binayak, Texas A&M University, College Station

• Montzka, Carsten, Forschungszentrum Jülich, Germany

• Mooney, Sacha, Univ. of Nottingham, UK

• Munira, Sirajum, Univ. of Manitoba, Winnipeg, MB, Canada

• Nakamura, Kengo, Tohoku Daigaku, Sendai, Japan

• Nakhaei, Mohammad, Kharazmi Univ., Tehran, Iran

• Nehls, Thomas

• Nemes, Attila, NIBIO, Aas, Norway

• Nguyen, Frédéric, Univ. de Liège Faculté des Sciences, Belgium

• Nieber, John, Univ. of Minnesota, St. Paul

• Nimmo, John, USGS, Menlo Park, CA

• Noborio, Kosuke, Meiji Univ., Kawasaki, Japan

• Ntarlagiannis, Dimitrios, Rutgers Univ., Newark, NJ

• Nyquist, Jonn, Temple Univ., Philadelphia, PA

• O'Carroll, Denis, Western Univ., London, ON, Canada

• O'Shaughnessy, Susan, USDA‐ARS, Bushland, TX

• OCarroll, Dennis, UNSW, Sydney, NSW, Australia

• Ochsner, Tyson, Oklahoma State Univ., Stillwater

• Oh, Seboong, Yeungnam Univ., Gyeongsan, Korea

• Oldenborger, Greg, Geological Survey of Canada, Ottawa

• Olmi, Roberto, National Research Council, Sesto Fiorentino, Italy

• Orlowski, Natalie, Freiburg im Breisgau, Germany

• Ottoni, Marta, Geological Survey of Brazil, Rio de Janeiro

• Pachepsky, Yakov, USDA‐ARS, Beltsville, MD

• Paltineanu, Cristian, National Research Institute of Soil Science and Agrochemistry, Bucharest, Romania

• Paradelo, Marcos, Rothamsted Research, Harpenden, UK

• Parajuli, Kshitij, Pacific Northwest National Laboratory, Richland, WA

• Patrignani, Andres, Kansas State Univ., Manhattan

• Petry, Mirta, Federal University of Santa Maria, Brazil

• Plampin, Michael, USGS, Reston, VA

• Porta, Giovanni M., Politecnico di Milano, Milano, Italy

• Provenzano, Giuseppe

• Puetz, Thomas, Forschungszentrum Julich Institut fur Bio und Geowissenschaften, Germany

• Quiring, Steven, The Ohio State Univ., Columbus

• Rabbani, Harris, Doha

• Rabbi, Sheikh, The Unive. of Sydney, Camden, NSW, Australia

• Radcliffe, David, Univ. of Georgia, Athens

• Radolinski, Jesse, Univ. of Innsbruck, Austria

• Rahmati, Mehdi, Univ. of Maragheh, Iran

• Raij, Iael, Ben‐Gurion Univ. of the Negev, Beer‐Sheva, Israel

• Ramos, Tiago B., Univ. de Lisboa Instituto Superior Tecnico, Portugal

• Rau, Gabriel, Karlsruhe Institute of Technology South Campus, Germany

• Reading, Lucy, Queensland Univ. of Technology, Brisbane, QLD, Australia

• Rivett, Michael

• Roques, Clément, ETH Zurich, Switzerland

• Sadeghi, Morteza, Utah State Univ., Logan

• Saintenoy, Albane

• Schomberg, Harry, USDA‐ARS, Beltsville, MD

• Schwartz, Robert, USDA‐ARS, Bushland, TX

• Schwartz, Michelle, Univ. of Texas at Arlington

• Scmidt, Radomir, Univ. of California Davis

• Sepehrnia, Patrici, Leibniz Univ. Hannover, Germany

• Shangguan, Zhouping, Yangling, China

• Sharma, Sumit, Oklahoma State Univ., Goodwell

• She, Dongli, Hohai Univ., Nanjing, China

• Shukla, Manoj, New Mexico State Univ., Las Cruces, NM

• Si, Bing, Univ. of Saskatchewan, Saskatoon, SK, Canada

• Siebecker, Matthew, Univ. of Delaware, Newark

• Siegel, Donald, Syracuse Univ., NY

• Simunek, Jirka, Univ. of California Riverside

• Soltysiak, Marek, Univ. Silesia, Sosnowiec, Poland

• Song, Zhaoliang, Tianjin Univ., Tianjin, China

• Stauffer, Philip, Los Alamos National Lab., NM

• Stewart, Ryan, Virginia Polytechnic Institute and State Univ. College of Natural Resources, Blacksburg

• Stovin, Virginia, Sheffield, UK

• Stähli, Manfred

• Sudduth, Kenneth, USDA‐ARS, Columbia, MO

• Tokunaga, Tetsu, E. O. Lawrence Berkeley National Lab., Berkeley, CA

• Tong, Juxiu, Tallahassee, FL

• Tso, Michael, Lancaster, UK

• Turkeltaub, Tuvia, Lancaster Univ., UK

• Van Dam, Jos, Wageningen Univ. and Research Centre, the Netherlands

• Van Dam, Remke, Centro Federal de Educacao Tecnologica de Minas Gerais, Belo Horizonte, Brazil

• van der Ploeg, Martine, Wageningen Univ., Wageningen, the Neterlands

• Van Der Zee, Sjoerd, Wageningen Univ., the Netherlands

• van Genuchten, Martinus, Rio de Janeiro, Brazil

• Vanderborght, Jan, Forschungszentrum Jülich, Germany

• Vasilas, Bruce, Newark, DE

• Vazifedoust, Majid, Guilan Univ., Rasht, Iran

• Vepraskas, Michael, North Carolina State Univ., Raleigh

• Verginelli, Iason, Rome

• Vetterlein, Doris, UFZ, Halle, Germany

• Vogel, Hans Jorg, Helmholtz Centre for Environmental Research, Halle, Germany

• Voltz, Marc

• Wan, Richard, Univ. of Calgary, Calgary, AB, Canada

• Wang, Dengjun, USEPA, Ada, OK

• Wang, Zhan, Shenyang, China

• Watanabe, Kunio, Graduate School of Bioresources, Tsu, Japan

• Weber, Tobias Karl David, Univ. of Hohenheim, Stuttgart, Germany

• Wei, Changfu, Chinese Academy of Sciences, Wuhan, China

• Weigand, Maximilian, Univ Bonn, Germany

• Weihermüller, Lutz, Forschungszentrum Jülich, Germany

• Wendroth, Ole, Univ. of Kentucky, Lexington

• Wetterlind, Johanna, SLU, Skara, Sweden

• Whalley, Richard, Rothamsted Research, Harpenden, UK

• Wollschläger, Ute, UFZ–Helmholtz Centre for Environmental Research, Halle (Salle), Germany

• Won, Jongmuk, Georgia Institute of Technology College of Engineering, Atlanta,

• Wu, Lan

• Wu, Laosheng, Univ. of California Riverside, CA

• Wu, Yuxin

• Xiao, Tiqiao, Chinese Academy of Sciences, Beijing

• Xiong, Yunwu, China Agricultural Univ., Beijing

• Yakirevich, Alexander, Ben‐Gurion Univ. of the Negev, Sede Boqer Campus, Israel

• Yu, Jian, Water Conservancy Science Research in Inner Mongolia Autonomous Region, Hohhot, Inner Mongolia, China

• Yunqiang, Wang, Institute of Earth Environment, Xi'an, Shaanxi, China

• Zarebanadkouki, Mohsen, Univ. of Bayreuth, Germany

• Zhang, Fred, Pacific Northwest National Lab., Richland, WA

• Zhao, Wenwu, Beijing

• Zhao, Ying, Northwest Agriculture and Forestry Univ., Yangling, China

• Zheng, Wenjuan, Univ. of Delaware, Newark

• Zhou, Hu, Chinese Academy of Sciences, Nanjing

• Zhu, Yuanjun

• Zitouna‐Chebbi, Rim, Carthage Univ.