( ( ( ( Seed rots ) and ) ( seedling diseases ) ) ( ( occur ( when ( conditions ( ( do not ) ( favor ( rapid ( seed ( germination ( and ( seedling emergence ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NN Seed) (NNS rots)) (CC and) (NP (VBG seedling) (NNS diseases))) (VP (VBP occur) (SBAR (WHADVP (WRB when)) (S (NP (NNS conditions)) (VP (VBP do) (RB not) (VP (VB favor) (NP (JJ rapid) (NN seed) (NN germination) (CC and) (NN seedling) (NN emergence))))))) (. .)))
Seed rots and seedling diseases occur when conditions do not favor rapid seed germination and seedling emergence.
(ROOT (S (NP (NN Seed)) (ADVP (RB dormancy)) (VP (VBZ ensures) (SBAR (IN that) (S (NP (NNS seeds)) (VP (VBP germinate) (ADVP (RB only)) (SBAR (WHADVP (WRB when)) (S (NP (NP (NNS conditions)) (PP (IN for) (NP (JJ seedling) (NN survival)))) (VP (VBP are) (ADJP (JJ optimal))))))))) (. .)))