( ( Plant ( ( Growth and ) Plant ) ) ( ( Nutrition 6 ) . ) )
(ROOT (S (NP (NNP Plant) (NNP Growth) (CC and) (NNP Plant)) (VP (VBZ Nutrition) (NP (CD 6))) (. .)))
Plant Growth and Plant Nutrition 6.
(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)))))))) (. .)))