( ( The blocks ) ( ( envisaged ( ( are ( ( vast and ) heterogeneous ) ) ( in ( terms ( of ( topography ( and ( vegetation composition ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NNS blocks)) (VP (VBD envisaged) (SBAR (S (VP (VBP are) (ADJP (JJ vast) (CC and) (JJ heterogeneous)) (PP (IN in) (NP (NP (NNS terms)) (PP (IN of) (NP (NN topography) (CC and) (NN vegetation) (NN composition))))))))) (. .)))
The blocks envisaged are vast and heterogeneous in terms of topography and vegetation composition.
(ROOT (S (NP (NNS Heterogeneous)) (VP (VBZ is) (NP (NP (DT the) (NN term)) (PP (IN for) (NP (NP (DT a) (NN mixture)) (SBAR (WHNP (WDT that)) (S (VP (VBZ varies) (PP (IN in) (NP (PRP$ its) (NN composition)))))))))) (. .)))