( ( ( The ( nine macronutrients ) ) ( -LRB- ( ( ( nitrogen , ) ( phosphorus ( , ( potassium ( , ( calcium ( , ( magnesium ( , ( sulfur ( , ( carbon ( , ( hydrogen ( , ( and oxygen ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) -RRB- ) ) ) ( ( are ( required ( in ( ( relatively large ) amounts ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (CD nine) (NNS macronutrients)) (PRN (-LRB- -LRB-) (NP (NP (NN nitrogen)) (, ,) (NP (NN phosphorus) (, ,) (NN potassium) (, ,) (NN calcium) (, ,) (NN magnesium) (, ,) (NN sulfur) (, ,) (NN carbon) (, ,) (NN hydrogen) (, ,) (CC and) (NN oxygen))) (-RRB- -RRB-))) (VP (VBP are) (VP (VBN required) (PP (IN in) (NP (ADJP (RB relatively) (JJ large)) (NNS amounts))))) (. .)))
The nine macronutrients (nitrogen, phosphorus, potassium, calcium, magnesium, sulfur, carbon, hydrogen, and oxygen) are required in relatively large amounts.
(ROOT (S (NP (NNP Potassium) (, ,) (NNP calcium) (, ,) (CC and) (NNP magnesium)) (VP (VBP are) (VP (VBN considered) (NP (NNS macronutrients)))) (. .)))