I've two draft's of yeast genomes, one assembled by Velvet and other assembled by CLC Workbench, with the following report:
Assembled by Velvet
Length 11354767 GC% 38.22% N's 1579 Scaffolds 214 N50 360969 Min 302 Max 705532
Assembled by CLC
Length 11533444 GC% 37.22% N's 2490 Scaffolds 851 N50 72755 Min 301 Max 215625
My question: The N50 value is the principal parameter for determine which the best assembling? This case, the draft by Velvet.