( ( ( ( ( The ( pH scale ) ) , ) ( from ( ( 1 to ) 14 ) ) ) , ) ( ( is ( ( a measure ) ( of ( ( ( ( the ( ( acidity or ) alkalinity ) ) ( of soil ) ) , ) ( determined ( by ( ( the concentration ) ( of ( ( hydrogen ions ) ( in ( a ( water ( or ( salt solution ) ) ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN pH) (NN scale)) (, ,) (PP (IN from) (NP (QP (CD 1) (TO to) (CD 14)))) (, ,)) (VP (VBZ is) (NP (NP (DT a) (NN measure)) (PP (IN of) (NP (NP (DT the) (NN acidity) (CC or) (NN alkalinity)) (PP (IN of) (NP (NN soil))) (, ,) (VP (VBN determined) (PP (IN by) (NP (NP (DT the) (NN concentration)) (PP (IN of) (NP (NP (NN hydrogen) (NNS ions)) (PP (IN in) (NP (DT a) (NN water) (CC or) (NN salt) (NN solution)))))))))))) (. .)))
The pH scale, from 1 to 14, is a measure of the acidity or alkalinity of soil, determined by the concentration of hydrogen ions in a water or salt solution.
(ROOT (S (NP (NP (DT The) (NN concentration)) (PP (IN of) (NP (NP (NN hydrogen) (NNS ions)) (PP (IN in) (NP (DT a) (NN solution)))))) (VP (VBZ is) (VP (VBN called) (ADVP (RB acidity)))) (. .)))