Is important to
note that there are reports about high contents of heavy
metals in poultry manure and fertilizer manufactured
with urban solids residues, that can affect edaphic
biology, contaminate water tanks and even translocate
to the aerial parts of the plant if they are deposited on
the ground (Liao y Xie, 2007; Rodríguez et al., 2012;
Delgado et al., 2014), therefore it is recommended
compost it because organic matter is stabilized and
facilitates the use of the properties of the manure
fertilizer (Estrada, 2005).