( ( ( ( The ( six macronutrients ) ) , ) ( ( ( ( ( ( ( ( ( ( ( ( nitrogen ( -LRB- ( N -RRB- ) ) ) , ) ( phosphorus ( -LRB- ( P -RRB- ) ) ) ) , ) ( potassium ( -LRB- ( K -RRB- ) ) ) ) , ) ( calcium ( -LRB- ( Ca -RRB- ) ) ) ) , ) ( magnesium ( -LRB- ( Mg -RRB- ) ) ) ) , ) and ) ( sulfur ( -LRB- ( S -RRB- ) ) ) ) ) ( ( are ( required ( by ( plants ( in ( large amounts ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (CD six) (NNS macronutrients)) (, ,) (NP (NP (NP (NN nitrogen)) (PRN (-LRB- -LRB-) (NP (NNP N)) (-RRB- -RRB-))) (, ,) (NP (NP (NN phosphorus)) (PRN (-LRB- -LRB-) (NP (NNP P)) (-RRB- -RRB-))) (, ,) (NP (NP (NN potassium)) (PRN (-LRB- -LRB-) (NP (NNP K)) (-RRB- -RRB-))) (, ,) (NP (NP (NN calcium)) (PRN (-LRB- -LRB-) (ADJP (JJ Ca)) (-RRB- -RRB-))) (, ,) (NP (NP (NN magnesium)) (PRN (-LRB- -LRB-) (NP (NNP Mg)) (-RRB- -RRB-))) (, ,) (CC and) (NP (NP (NN sulfur)) (PRN (-LRB- -LRB-) (NP (NNP S)) (-RRB- -RRB-))))) (VP (VBP are) (VP (VBN required) (PP (IN by) (NP (NP (NNS plants)) (PP (IN in) (NP (JJ large) (NNS amounts))))))) (. .)))
The six macronutrients, nitrogen (N), phosphorus (P), potassium (K), calcium (Ca), magnesium (Mg), and sulfur (S) are required by plants in large amounts.
(ROOT (S (NP (NNP Potassium) (, ,) (NNP calcium) (, ,) (CC and) (NNP magnesium)) (VP (VBP are) (VP (VBN considered) (NP (NNS macronutrients)))) (. .)))