10 



MASS. EXPERIMENT STATION BULLETIN 439 



and fuel-oil costs oi burning these stumps amounted to $60 per acre, cost of the 

 gas shovel was $80 per acre, and bulldozer charges for grading land and pushing 

 out boulders amounted to $20 per acre. The gas shovel has been more expensive 

 than the bulldozer for stump removal and the latter machine has been necessary 

 for leveling the land after the shovel had removed stumps 



A typical example of stump removal for pasture occurred on a Connecticut 

 Valley farm where 20 acres of pine and hardwood stumps were pushed out with a 

 bulldozer and the land leveled at a cost of $58 per acre. Less than 10 hours was 

 required per acre to remove these stumps, which ranged from one to two feet in 

 diameter. Some were used to fill low, wet areas in the lot while others were piled 



Figure 5. 



A. Removing Stumps with Grubber Blade Saves Topsoil. 



B. Pushing Out Stump with Grubber Blade. 



