It is important to prevent a deterioration in
quality if pellets are stored for a long time. Compost
pellets become moldy if they are packed and stored
without drying (Table 1). Therefore, it is necessary
to reduce the moisture content of the pellets to 20%
or less. Compost pellets generate more mold on the
surface than ordinary compost, even if the compost
has the same moisture content. If the compost used
to make the pellets is immature, deterioration is very
noticeable. During the summer, it is necessary to
reduce the moisture content of the pellets to 15% or
less if cost permits, because deterioration by
condensation is caused even at a 20% moisture
content.