( ( ( ( ( Soil ( ( contains ( ( twice ( the amount ) ) ( of carbon ) ) ) ( as ( does ( the atmosphere ) ) ) ) ) , ) and ) ( it ( appears ( capable ( of ( ( ( storing ( much ( of ( the increase ) ) ) ) ( in ( atmospheric ( carbon dioxide ) ) ) ) ( if ( ( key ( agricultural practices ) ) ( are adopted ) ) ) ) ) ) ) ) ) . )
(ROOT (S (S (NP (NNP Soil)) (VP (VBZ contains) (NP (NP (RB twice) (DT the) (NN amount)) (PP (IN of) (NP (NN carbon)))) (SBAR (IN as) (S (VP (VBZ does) (NP (DT the) (NN atmosphere))))))) (, ,) (CC and) (S (NP (PRP it)) (VP (VBZ appears) (ADJP (JJ capable) (PP (IN of) (S (VP (VBG storing) (NP (NP (RB much)) (PP (IN of) (NP (DT the) (NN increase)))) (PP (IN in) (NP (JJ atmospheric) (NN carbon) (NN dioxide))) (SBAR (IN if) (S (NP (JJ key) (JJ agricultural) (NNS practices)) (VP (VBP are) (VP (VBN adopted))))))))))) (. .)))
Soil contains twice the amount of carbon as does the atmosphere, and it appears capable of storing much of the increase in atmospheric carbon dioxide if key agricultural practices are adopted.
(ROOT (S (PP (IN During) (NP (DT the) (JJ early) (NN paleozoic))) (, ,) (NP (NP (DT the) (NN amount)) (PP (IN of) (NP (NP (NN carbon) (NN dioxide)) (PP (IN in) (NP (DT the) (NN atmosphere)))))) (VP (VBD was) (ADJP (RB much) (JJR greater)) (PP (VBN compared) (PP (TO to) (NP (NN today))))) (. .)))