Question

Loamy soil is ideal for gardening because it contains

Answer 1

http://en.wikipedia.org/wiki/Loam

Answer 2

Loam soil is good for plants do to being able to retain a lot more water, it also drains well so it won't drown the plant, because of it being able to drain well air can reach the roots which helps the plant grow.

Answer 3

I would take it to be:
Loamy soil is ideal for gardening because it contains humus.