( ( ( ( Differences ( in ( chemical composition ) ) ) ( of ( plants growth ) ) ) ( at ( ( constant ( relative ( growth rates ) ) ) ( with ( stable ( mineral nutrition ) ) ) ) ) ) . )
(ROOT (NP (NP (NNS Differences)) (PP (IN in) (NP (NN chemical) (NN composition))) (PP (IN of) (NP (NNS plants) (NN growth))) (PP (IN at) (NP (NP (JJ constant) (JJ relative) (NN growth) (NNS rates)) (PP (IN with) (NP (JJ stable) (NN mineral) (NN nutrition))))) (. .)))
Differences in chemical composition of plants growth at constant relative growth rates with stable mineral nutrition.
(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)))))))) (. .)))