Make you up a frame to hold a fifty five gallon drum in place on your harrow. Install a three quarter inch ball valve in threaded hole in barrel head. Turn the valve down to the bottom of the drum laying horizontally. Above the 3/4 inch hole is a two inch bung hole with a threaded bung screwed in. When you need weight put water in two inch opening, when you don’t need weight, drain the water out. Water weighs 8.34 lbs/gallon. Full drum is about 458 lbs.
Yep but it's my subsoiler that won't cut the dirt. Attaching a 55 gal drum to that will be a challenge. If I can get the dirt to turn my discs will cut it up just fine.