The concentration of the NPK macronutrients was comparable
to other composts developed from MSW (Tognetti et al., 2007a,b;
Moldes et al., 2007). When the organic fraction was nondifferentiated
(C 1-3), the N content was around 1.6%. This value
was within the range of values found in composts from other
organic materials, such as composts from agroindustrial wastes of
vegetable origin and manures (Bustamante et al., 2010). In addition,
the concentrations of P and K were similar to or greater than those
reported in the agroindustrial and livestock derived composts
previously mentioned, showing the compost made from vegetablefruit
waste (C4) had the highest NPK content.