( ( ( ( ( ( Our results ) ( ( show ( ( a ( sharp increase ) ) ( in ( available ( soil nitrogen ) ) ) ) ) ( after clearing ) ) ) , ) but ) ( ( ( ( ( this increase ) ( ( is short ) lived ) ) , ) and ) ( ( ( nitrogen cycling ) ( in ( ( the soils ) ( of ( three-year-old pasture ) ) ) ) ) ( ( is ( less than ) ) ( in ( the ( original forest ) ) ) ) ) ) ) . )
(ROOT (S (S (NP (PRP$ Our) (NNS results)) (VP (VBP show) (NP (NP (DT a) (JJ sharp) (NN increase)) (PP (IN in) (NP (JJ available) (NN soil) (NN nitrogen)))) (PP (IN after) (NP (NN clearing))))) (, ,) (CC but) (S (S (NP (DT this) (NN increase)) (VP (VBZ is) (ADVP (RB short)) (VP (VBN lived)))) (, ,) (CC and) (S (NP (NP (NN nitrogen) (NN cycling)) (PP (IN in) (NP (NP (DT the) (NNS soils)) (PP (IN of) (NP (JJ three-year-old) (NN pasture)))))) (VP (VBZ is) (ADVP (RBR less) (IN than)) (PP (IN in) (NP (DT the) (JJ original) (NN forest)))))) (. .)))
Our results show a sharp increase in available soil nitrogen after clearing, but this increase is short lived, and nitrogen cycling in the soils of three-year-old pasture is less than in the original forest.
(ROOT (S (NP (DT The) (NN nitrogen) (NN cycle)) (VP (VBZ includes) (NP (NP (NN air)) (, ,) (NP (NN soil)) (, ,) (CC and) (NP (VBG living) (NNS things)))) (. .)))