( ( micronutrient ( ( a ( chemical element ) ) ( necessary ( in ( ( ( only ( ( extremely small ) amounts ) ) ( -LRB- ( ( ( ( less ( than 1 ) ) part ) ( per ( million ( in ( the plant ) ) ) ) ) -RRB- ) ) ) ( for ( ( the growth ) ( of plants ) ) ) ) ) ) ) ) . )
(ROOT (S (VP (VB micronutrient) (S (NP (DT a) (NN chemical) (NN element)) (ADJP (JJ necessary) (PP (IN in) (NP (NP (JJ only) (ADJP (RB extremely) (JJ small)) (NNS amounts)) (PRN (-LRB- -LRB-) (NP (NP (QP (JJR less) (IN than) (CD 1)) (NN part)) (PP (IN per) (NP (NP (CD million)) (PP (IN in) (NP (DT the) (NN plant)))))) (-RRB- -RRB-)) (PP (IN for) (NP (NP (DT the) (NN growth)) (PP (IN of) (NP (NNS plants)))))))))) (. .)))
micronutrient a chemical element necessary in only extremely small amounts (less than 1 part per million in the plant) for the growth of plants.
(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)))))))) (. .)))