( ( The soil ) ( ( was ( a ( well-drained ( sandy loam ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN soil)) (VP (VBD was) (NP (DT a) (JJ well-drained) (JJ sandy) (NN loam))) (. .)))
The soil was a well-drained sandy loam.
(ROOT (S (S (NP (DT This) (NN statement)) (ADVP (RB best)) (VP (VBZ describes) (NP (JJ sandy) (NNS soils)))) (: :) (S (NP (JJ sandy) (NNS soils)) (VP (VBP allow) (NP (NN water)) (S (VP (TO to) (VP (VB drain) (ADVP (RB quickly))))))) (. .)))
This statement best describes sandy soils: sandy soils allow water to drain quickly.