heavy branch wood (Ja, 301)
• (p. pr. & vb. n.) of Lop • (n.) A cutting off, as of branches; that which is cut off; leavings.
heavy branch wood (Ja, 301)
Lop'ping noun A cutting off, as of branches; that which is cut off; leavings. « The loppings made from that stock whilst it stood.» Burke. 
cutting tree tops to a maximum specified height above the ground after a tree is felled.