( There ( ( ( are ( ( 20 elements ) necessary ) ) ( for ( plant growth ) ) ) . ) )
(ROOT (S (NP (EX There)) (VP (VBP are) (ADJP (NP (CD 20) (NNS elements)) (JJ necessary)) (PP (IN for) (NP (NN plant) (NN growth)))) (. .)))
There are 20 elements necessary for plant growth.
(ROOT (S (NP (NNP Plant) (NNP nutrition)) (VP (VBZ is) (NP (NP (DT the) (NN study)) (PP (IN of) (NP (NP (DT the) (JJ chemical) (NNS elements)) (ADJP (JJ necessary) (PP (IN for) (NP (NN plant) (NN growth)))))))) (. .)))