Because it contains humus and decomposing plant material, it will help to add moisture and nutrients to the soil.
(it; contains; humus and decomposing plant material) (it; will help; to add moisture and nutrients to the soil) Context(it will help,List([58, 70))):(it; will help to add; moisture and nutrients; to the soil)
it will help,List([58, 70))
it it it
contains will help will help to add
humus and decomposing plant material
to add moisture and nutrients to the soil
moisture and nutrients to the soil