our study in which three compost treatments increased tomato yield if compared with
CF and CK. In this study, all treatments were applied with the same
N contents and therefore more P and K fertilizers were applied
into soil in the three compost treatments than in CF and CK treatments.
Moreover, the contents of P and K in CMwere higher than in
VM and HM, hence higher tomato yield was obtained in CM under
the low or high irrigation levels. Under 60–70%f, VM produced
greater yield than the othertwocomposts. Thismaybe explained by
the following reasons. Vermicomposting differs from conventional
composting because the organic material is processed by the digestive
systems of worms