( ( ( Biogeochemical cycling ) ( of ( elements ( in ( ( the context ) ( of ( air ( , ( water ( , ( food ( and ( land usage ) ) ) ) ) ) ) ) ) ) ) ) ) ( ( are discussed ) . ) )
(ROOT (S (NP (NP (JJ Biogeochemical) (NN cycling)) (PP (IN of) (NP (NP (NNS elements)) (PP (IN in) (NP (NP (DT the) (NN context)) (PP (IN of) (NP (NN air) (, ,) (NN water) (, ,) (NN food) (CC and) (NN land) (NNS usage)))))))) (VP (VBP are) (VP (VBN discussed))) (. .)))
Biogeochemical cycling of elements in the context of air, water, food and land usage are discussed.
(ROOT (S (NP (DT The) (NN water) (NN cycle)) (VP (VBZ involves) (NP (NP (NN movement)) (PP (IN of) (NP (NP (NN water)) (PP (IN between) (NP (NN air) (CC and) (NN land))))))) (. .)))