They also study how water affects different kinds of soil and conduct long term experiments to explore how roots and plants grow in various soils and how, with the help of worms, old plants decompose and become part of the soil.
(They; study; how water affects different kinds of soil and conduct long term experiments) Context(They study,List([0, 15))):(water; affects; different kinds of soil) (old plants; decompose; ) (old plants; become; part of the soil)
They study,List([0, 15))
They water old plants old plants
study affects decompose become
how water affects different kinds of soil and conduct long term experiments
different kinds of soil
part of the soil