mavji -mav- gismu

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

See also gurni.

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.
mavypesxu
p1 is a quantity of oatmeal/porridge made from oat species p2=m2