[From Philippe Lagacherie, INRA, France]
Mapping soil functions is effectively the way forward. This means moving from monovariate DSM to multivariate DSM, which carries some methodological issues that should be thoroughly addressed in the near future. In the following, I cite three of them, among others: how to find the best inference trajectory between “mapping first the soil properties then combine them” or the reverse (and all the intermediates)? How to account for correlations between soil properties in the DSM models for not creating pedo-chimera that could lead to mistaken estimations of soil functions? How to propagate the uncertainties in mapping soil properties toward the function map? Some of these questions have been already worked out, including recently, but this does not end the story.