Other chickens walk around the bale browsing around the edges of the bale, and eating the alfalfa flakes that get scratched off onto the ground by the upper chickens. Alfalfa is a very nutritious food crop. Alfalfa sends it's roots deep into the soil.
Soil or Waste Stacks. A soil or waste stack (normally just called a stack) is a drainage pipe that passes through at least one story(floor to ceiling) as a drain pipe, this also includes any horizontal offsets. Every soil or waste stack will terminate in a stack vent that leads to outside air or a vent header.
1. waste pipe-a pipe through which liquid is carried away. drainpipe, drain. culvert-a transverse and totally enclosed drain under a road or railway. pipage, pipe, piping-a long tube made of metal or plastic that is used to carry water or oil or gas etc.scupper-drain that allows water on the deck of a vessel to flow overboard. sewer, sewerage, cloaca-a waste pipe that carries away sewage or surface water. soil pipe-drain that conveys liquid waste from toilets, etc.trap-drain consisting of a U-shaped section of drainpipe that holds liquid and so prevents a return flow of sewer gas.. waste pipe-a pipe through which liquid is carried away. drainpipe, drain. culvert-a transverse and totally enclosed drain under a road or railway. pipage, pipe, piping-a long tube made of metal or plastic that is used to carry water or oil or gas etc.