How Alexander von Humboldt's life story can inspire innovative soil research in developing countries

Abstract. The pioneering vision of Alexander von Humboldt of science and society of the early 1800s is still highly relevant today. His open mind and urge to make many measurements characterizing the interconnected web of life are crucial ingredients as we now face the worldwide challenge of the UN Sustainable Development Goals. Case studies in the Philippines, Vietnam, Kenya, Niger, and Costa Rica demonstrate, in Alexander's spirit, interaction with stakeholders and attention to unique local conditions, applying modern measurement and modeling methods and allowing inter- and transdisciplinary research approaches. But relations between science and society are increasingly problematic, partly as a result of the information revolution and post-truth , fact-free thinking. Overly regulated and financially restricted scientific communities in so-called developed countries may stifle intellectual creativity. Researchers in developing countries are urged to leapfrog these problems in the spirit of Alexander von Humboldt as they further develop their scientific communities. Six suggestions to the science community are made with particular attention to soil science. (The Humboldt lecture, presented by the 2017 recipient of the Alexander von Humboldt lecture, Johan Bouma, can be accessed at http://client.cntv.at/egu2017/ml1 .)

[1]  R. Roetter,et al.  Yield response of maize to fertilizers and manure under different agro-ecological conditions in Kenya , 1992 .

[2]  J. Bouma,et al.  Water management for rice cultivation on acid sulphate soils in the Plain of Reeds, Vietnam , 2000 .

[3]  J. Bouma,et al.  Hydropedology and the Societal Challenge of Realizing the 2015 United Nations Sustainable Development Goals , 2016 .

[4]  Suhas P. Wani,et al.  Managing water in rainfed agriculture—The need for a paradigm shift , 2010 .

[5]  Johan Bouma,et al.  Facing policy challenges with inter- and transdisciplinary soil research focused on the UN Sustainable Development Goals , 2016 .

[6]  J. Bouma,et al.  The role of quantitative approaches in soil science when interacting with stakeholders. , 1997 .

[7]  P. Hiernaux,et al.  Strategies to optimize allocation of limited nutrients to sandy soils of the Sahel: a case study from Niger, west Africa , 2003 .

[8]  J. Bouma,et al.  Use of soil-map delineations to improve (Co-)kriging of point data on moisture deficits , 1988 .

[9]  Johan Bouma,et al.  Participatory research for systems analysis: prototyping for a Costa Rican banana plantation , 2004 .

[10]  E. J. Huising,et al.  Evaluating land use at the sub‐regional level in the Atlantic zone of Costa Rica, considering biophysical land potentials , 1994 .

[11]  B. H. Janssen,et al.  Calibration of quefts, a model predicting nutrient uptake and yields from chemical soil fertility indices , 1993 .

[12]  J. Bouma,et al.  Tillage and water management for riceland productivity in acid sulfate soils of the Mekong delta, Vietnam. , 1997 .

[13]  John P. A. Ioannidis,et al.  A manifesto for reproducible science , 2017, Nature Human Behaviour.

[14]  Ryan Collett,et al.  Developing a Foundation for Constructing New Curricula in Soil, Crop, and Turfgrass Sciences. , 2012 .

[15]  J. Bouma,et al.  Changes in physical properties of young and old volcanic surface soils in Costa Rica after clearing of tropical rain forest , 1989 .

[16]  Alfred Stein,et al.  Methods for comparing spatial variability patterns of millet yield and soil data. , 1997 .

[17]  Marcel R. Hoosbeek,et al.  Towards the quantitative modeling of pedogenesis — a review , 1992 .

[18]  Kazuki Saito,et al.  Can sub-Saharan Africa feed itself? , 2016, Proceedings of the National Academy of Sciences.

[19]  J. Stoorvogel,et al.  Soil science input in transdisciplinary projects in the Netherlands and Italy , 2015 .

[20]  Johan Bouma,et al.  Soil science contributions towards Sustainable Development Goals and their implementation: linking soil functions with ecosystem services , 2014 .

[21]  Johan Bouma,et al.  The significance of soils and soil science towards realization of the United Nations sustainable development goals , 2016 .

[22]  Johan Bouma,et al.  Engaging Soil Science in Transdisciplinary Research Facing “Wicked” Problems in the Information Society , 2015 .

[23]  J. Bouma,et al.  Measurement of surface redistribution of rainfall and modelling its effect on water balance calculations for a millet field on sandy soil in Niger , 1997 .

[24]  Alex B. McBratney,et al.  Soil Science teaching principles , 2011 .

[25]  Johan Bouma,et al.  Sampling strategies for measurement of soil hydraulic properties to predict rice yield using simulation models , 1993 .

[26]  J. Bouma,et al.  Reducing bypass flow through a dry, cracked and previously puddled rice soil , 1994 .

[27]  J. Bouma,et al.  Sampling number and design for measurements of infiltration rates into puddled rice fields , 1992 .

[28]  Gerard B. M. Heuvelink,et al.  The role of scientists in multiscale land use analysis: lessons learned from Dutch communities of practice , 2008 .

[29]  J. Bouma,et al.  Contamination of surface water as affected by land use in acid sulfate soils in the Mekong River Delta, Vietnam , 1997 .

[30]  E. J. Huising,et al.  Variation of measured banana yields in a Costa Rican plantation as explained by soil survey and thematic mapper data. , 1990 .

[31]  R. Rabbinge,et al.  Ecoregional research for development , 2007 .

[32]  P. Sloot,et al.  A statistical analysis of the influence of Striga hermonthica on maize yields in fertilizer trials in Southwestern Kenya , 1991, Plant and Soil.

[33]  J. Bouma,et al.  Bypass flow and leaching of nitrogen in a Kenyan Vertisol at the onset of the growing season , 1992 .

[34]  A. McBratney,et al.  Engaging employers, graduates and students to inform the future curriculum needs of soil science , 2013 .

[35]  J. Powell,et al.  Increasing nutrient use efficiency in West-African agriculture: the impact of micro-topography on nutrient leaching from cattle and sheep manure , 1998 .

[36]  Alfred E. Hartemink,et al.  The joy of teaching soil science , 2014 .

[37]  Johan Bouma,et al.  Soil Sampling Strategies for Precision Agriculture Research under Sahelian Conditions , 2000 .

[38]  O. Husson,et al.  Soil and water indicators for optimal practices when reclaiming acid sulphate soils in the Plain of Reeds, Viet Nam. , 2000 .

[39]  J. Bouma,et al.  Bypass flow and its role in leaching of raised beds under different land use types on an acid sulphate soil. , 1997 .

[40]  R. Lal Food security in a changing climate , 2013 .

[41]  F. Chapin,et al.  Planetary boundaries: Exploring the safe operating space for humanity , 2009 .