bavmi gismu

x₁ is a quantity of barley [grain] of species/strain x₂.

In notes:

gurni: x₁ is grain/[British: corn]/cereal from plant/species x₂.
djagru: g₁=c₁ is grain from plant/species g₂, edible/giving nutrition to x₃=c₂.
selbavmi: x₂=b₁ is barley of species/strain x₁=b₂.