( ( Soils ( with ( a ( high ( humus content ) ) ) ) ) ( ( are ( called ( organic soils ) ) ) . ) )
(ROOT (S (NP (NP (NNS Soils)) (PP (IN with) (NP (DT a) (JJ high) (NNS humus) (NN content)))) (VP (VBP are) (VP (VBN called) (NP (JJ organic) (NNS soils)))) (. .)))
Soils with a high humus content are called organic soils.
(ROOT (S (NP (NP (DT The) (JJ decayed) (NNS remains)) (PP (IN of) (NP (VBG living) (NNS organisms)))) (VP (VBZ is) (VP (VBN called) (NP (NNS humus)))) (. .)))