( ( humus ( ( The ( brown ( or ( black ( organic part ) ) ) ) ) ( of ( ( the soil ) ( resulting ( from ( ( the ( partial decay ) ) ( of ( ( leaves and ) ( other matter ) ) ) ) ) ) ) ) ) ) . )
(ROOT (S (VP (VBZ humus) (NP (NP (DT The) (JJ brown) (CC or) (JJ black) (JJ organic) (NN part)) (PP (IN of) (NP (NP (DT the) (NN soil)) (VP (VBG resulting) (PP (IN from) (NP (NP (DT the) (JJ partial) (NN decay)) (PP (IN of) (NP (NP (NNS leaves)) (CC and) (NP (JJ other) (NN matter))))))))))) (. .)))
humus The brown or black organic part of the soil resulting from the partial decay of leaves and other matter.
(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)))) (. .)))