5. Conclusions

It is important to consider which type of soil characteristics should be improved when applying agricultural wastes. For the physical properties, vegetable wastes with a high content of lignified organic matter can be used successfully, influencing soil density, porosity, and hydraulic conductivity. However, if the objective is to increment the nutrient availability, less lignified and more labile residues may be added to the soil, although in this case a possible imbalance of nutrients in soil may be found.

The main objective in the EU and, in fact, in the planet, is to reduce the production and increase the recycling of agricultural wastes, participating on the valorization of the residues and introducing them in the strategies of the circular economy and zero wastes. Joining soil and organic matter amendments allows us to get better soils and the best agricultural management, favoring the carbon sequestration under the present climate change scenery.
