The stalk material left after crushing sweet sorghum for ethanol production is called:

The correct term for the stalk material left after crushing sweet sorghum for ethanol production is bagasse. Bagasse specifically refers to the fibrous residue that remains after the extraction of juice from plants like sugarcane and sorghum, primarily used in the production of biofuels. This material can be used in various applications, including as a biomass fuel or in the production of certain types of paper and building materials.

Silage is a type of fermented feed that is made from green foliage crops, typically used for livestock feed rather than as a byproduct from ethanol production. Stover generally refers to the leftover stalks, leaves, and cob of a crop like corn after harvest, but in the context of sweet sorghum and ethanol production, that terminology is not applied. Straw is the dry stalks of cereal plants after the grain has been removed and is not specific to sweet sorghum or its ethanol byproducts.