Collecting the dirt on soils : advancements in plot-level soil testing and implications for agricultural statistics
Gourlay, S.; Aynekulu, E.; Shepherd, K.; Carletto, C. 2017. Collecting the dirt on soils : advancements in plot-level soil testing and implications for agricultural statistics. Policy Research working paper; no. WPS 8057. Washington, D.C. : World Bank Group.


