( ( ( ( ( ( Predaceous ( and ( omnivore ( nematode populations ) ) ) ) ( were ( low ( in ( both ( farming systems ) ) ) ) ) ) , ) and ) ( ( plant-parasitic ( nematode species ) ) ( reflected ( ( the crop ) ( sequences ( in ( rotations ( used ( in ( each system ) ) ) ) ) ) ) ) ) ) . )
(ROOT (S (S (NP (NNS Predaceous) (CC and) (NN omnivore) (NN nematode) (NNS populations)) (VP (VBD were) (ADJP (JJ low) (PP (IN in) (NP (DT both) (NN farming) (NNS systems)))))) (, ,) (CC and) (S (NP (JJ plant-parasitic) (NN nematode) (NNS species)) (VP (VBD reflected) (SBAR (S (NP (DT the) (NN crop)) (VP (VBZ sequences) (PP (IN in) (NP (NP (NNS rotations)) (VP (VBN used) (PP (IN in) (NP (DT each) (NN system))))))))))) (. .)))
Predaceous and omnivore nematode populations were low in both farming systems, and plant-parasitic nematode species reflected the crop sequences in rotations used in each system.
(ROOT (S (NP (NNS Nematodes)) (VP (MD can) (VP (VB be) (NP (NP (DT a) (NN parasite)) (PP (IN of) (NP (DT both)))))) (. .)))
Nematodes can be a parasite of both.