Staff writers Sam McKewon and Jon Nyatawa single out some key sights and sounds from NU’s practice Saturday:

SEEN

>> A glimpse of quarterback Taylor Martinez’s new passing mechanics. Martinez’s release point is higher, his motion is more deliberate and his corner throws have more loft. We’ll get a better sense throughout camp of how he’s progressing, but not bad on day one.

>> Nebraska’s new practice jerseys — the defense wore red, the offense wore white — supplied by Adidas. Both jerseys had three “claw mark” stripes on each shoulder.

>> During stretching drills, running back Rex Burkhead rescuing off the practice field a mechanical pencil dropped by a roving reporter. Burkhead flicked the pencil toward the sideline.

>> Sophomore Husker I-back Ameer Abdullah, without the dreadlocks he wore as a freshman.

>> Sophomore safety Corey Cooper standing between and talking with two former Husker defensive backs, Eric Warfield and Austin Cassidy, as the first-team defense conducted a walk-through before practice began.