Sewage sludge applied to soil microbiological and chemical properties, tomato (Solanum lycopersicum Mill) yield and fruit quality
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Abstract
National Institute of Agricultural Sciences (INCA), with the
aim of evaluating the agricultural use impact of urban sewage
sludge from «Quibú» Purifying Station of Residual Waters.
Biosolids obtained through anaerobic digestion and applied
to a compacted Red Ferralitic soil increased oxidizing organic
matter, assimilable phosphorus and changeable calcium
contents. Total contents of bacteria, fungi and actinomyces
became higher in the soil, whereas pathogen populations were
minimal and in some cases null. On the other hand, it was
observed that this organic residual had a positive influence
on tomato plant production and its components, without
affecting fruit quality. In general, the agricultural use of
biosolids proved to be a viable choice in agricultural
exploitation systems.
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