It is called a crop
It is called colostomy or ileostomy or even gastrostomy dependently where the sack is inserted. Colostomy for the colon, ileostomy for the small intestine or gastrostomy for the stomach.
The sand and clay soil is the type of soil and sand that would be used by the tortoise to substrate.
potted soil, vermiculite
Generally clay is used.
Lynchburg
Believe it or not.... I've used ordinary clay soil with success.
Ethyl alcohol is the only alcohol used in medications that must be ingested.
Roses like acidic soil but the level of acid they prefer depends on the type.
Strip cropping
silt
To prevent Soil Erosion
Soil, waste ,storm