( ( ( ( ( Make ( a cut ) ) ( through ( the ( major veins ) ) ) ) and ) ( ( lay ( the ( entire leaf ) ) ) ( on ( the ( rooting media ) ) ) ) ) . )
(ROOT (S (VP (VP (VB Make) (NP (DT a) (NN cut)) (PP (IN through) (NP (DT the) (JJ major) (NNS veins)))) (CC and) (VP (VB lay) (NP (DT the) (JJ entire) (NN leaf)) (PP (IN on) (NP (DT the) (JJ rooting) (NNS media))))) (. .)))
Make a cut through the major veins                and lay the entire leaf on the rooting media.
(ROOT (S (NP (JJ Young) (NNS roots) (CC and) (NNS leaves)) (VP (VBP are) (NP (NP (DT the) (JJ major) (NNS sites)) (PP (IN of) (NP (NN gibberellin) (NN production))))) (. .)))