Glad I am not the only one who hates that shield . Mine is going to come off one way or another . I have the metal shield which will flip up on my bush hog brand , land pride should take notice and do the same .My 12 yr. old bush hog squeeler with old blades that have been sharpened a dozen times or so out cuts this new land pride by far on my fields , it gives a much cleaner cut . Maybe because it is well broken in, I just don't know . The land pride blades are new , turn freely , and unit is set up like I do the bush hog and still leaves alot of uncut grass in the same exact conditions .
if you look at different "finishing mower blades" some blades really twist a lot at there ends, while other blades are simply a flat bar with cut edges.
the twisting of the blades. creates a certain amount of "suction" or vacuum effect to pull stuff up into the blades.
the bottom side of the deck has a critical roll as well as in how much suction / vacuum effect happens as well to pull stuff up into the blades, and were stuff is discharged (sides or rear, or where ever) if you look at some decks make it a finishing mower to bush hog (roatory cutter), they deck might be square or an odd shape, but under the deck, they have curved pieces that follow the blades as portion of the deck, to help maintain / create a better suction / vacuum effect.
different bush hogs (rotatory cutters) i see many with completely open backs or open sides, (shields have been removed, or chains put in place of shields. can also effect the suction or vacuum effect.
blade tip speed, if you are lowing your RPM's while cutting like many do, perhaps you need to pickup the RPM's on the engine for higher blade tip speed, to get a better suction / vacuum effect.
some rottery cutters i see single large blade, or perhaps 2 blades, that bolt onto right next to the main shaft but are allowed to pivot some, other blades bolt directly near shaft, but half way out to the tip, they blades are split up into 2 sections. and the outer section is allowed to spin freely. these different types of blades may have a certain twist some place in there over all blade.
some folks accidentally put sharp edge on blades wrong side up on blades, or try to make blade way to sharp, when sharpening them.
some improperly set the 3pt hitch and tail wheel/s up. so one corner is higher than others and messes up the suction / vacuum effect.