( Also ( , ( ( ( fertilizer not ) ( absorbed ( by ( the ( plant roots ) ) ) ) ) ( ( may ( contaminate ( groundwater ( and ( surface water ) ) ) ) ) . ) ) ) )
(ROOT (S (ADVP (RB Also)) (, ,) (NP (NP (NN fertilizer) (RB not)) (VP (VBN absorbed) (PP (IN by) (NP (DT the) (NN plant) (NNS roots))))) (VP (MD may) (VP (VB contaminate) (NP (NN groundwater) (CC and) (NN surface) (NN water)))) (. .)))
Also, fertilizer not absorbed by the plant roots may contaminate groundwater and surface water.
(ROOT (S (SBAR (WHADVP (WRB When)) (S (S (NP (DT the) (NN ground)) (VP (VBZ absorbs) (NP (DT the) (NN water)))) (CC and) (S (NP (PRP it)) (VP (VBZ settles) (PP (IN below) (NP (DT the) (NN surface))))))) (NP (PRP it)) (VP (VBZ is) (VP (VBN called) (NP (NN groundwater)))) (. .)))