I fully support the inclusion of all plant nutrients in the CoCoFe while recognizing the limited availability of other sources of nutrients besides fertilizer in many smallholder farming systems. Integration of organic inputs (and other soil mgt implements) mostly aims at addressing those soil fertility constraints that limit the uptake and use efficiency of fertilizer. Integrated Soil Fertility Management (see attached some papers with more details) also aims at optimizing not only the supply of nutrients (in line with the 4R nutrient management strategy) but also the demand for those nutrients through inclusion of the use of improved germplasm and other good agronomic practices.
bernard vanlauwe