( ( ( Nitrogen ( , ( phosphorous ( , ( potassium ( , ( calcium ( , ( ( magnesium and ) sulfur ) ) ) ) ) ) ) ) ) ( are called ) ) ( ( ( ( macronutrients , ) and ) ( are ( ( the ( basic nutrients ) ) ( required ( by ( plants ( in ( ( relatively large ) amounts ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NN Nitrogen) (, ,) (NN phosphorous) (, ,) (NN potassium) (, ,) (NN calcium) (, ,) (NN magnesium) (CC and) (NN sulfur)) (SBAR (S (VP (VBP are) (VP (VBN called)))))) (VP (VP (VBZ macronutrients)) (, ,) (CC and) (VP (VBP are) (VP (NP (DT the) (JJ basic) (NNS nutrients)) (VBN required) (PP (IN by) (NP (NP (NNS plants)) (PP (IN in) (NP (ADJP (RB relatively) (JJ large)) (NNS amounts)))))))) (. .)))
Nitrogen, phosphorous, potassium, calcium, magnesium and sulfur are called macronutrients, and are the basic nutrients required by plants in relatively large amounts.
(ROOT (S (NP (NNP Potassium) (, ,) (NNP calcium) (, ,) (CC and) (NNP magnesium)) (VP (VBP are) (VP (VBN considered) (NP (NNS macronutrients)))) (. .)))