( This ( ( ( makes ( that soil ) ) ( a ( heterogeneous mixture ) ) ) . ) )
(ROOT (S (NP (DT This)) (VP (VBZ makes) (NP (DT that) (NN soil)) (NP (DT a) (JJ heterogeneous) (NN mixture))) (. .)))
This makes that soil a heterogeneous mixture.
(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)))))))))) (. .)))