merke

/merke/

Cases

SingularPluralWhen to use it
nominativemerkethe measure of grainmerkelethe measure of grainsthe plain dictionary form — the doer of the sentence
genitivemerkenithe measure of grain'smerkelenithe measure of grains'the owner — whose it is
accusativemerkenithe measure of grain (as the object)merkelenithe measure of grains (as the object)a specific, known object — whom or what
dativemerkegeto the measure of grainmerkelegeto the measure of grainsdirection or recipient — to where, to whom
locativemerkedeat / in the measure of grainmerkeledeat / in the measure of grainswhere it is; also having — mende bar, "I have it"
ablativemerkedenfrom the measure of grainmerkeledenfrom the measure of grainswhere it comes from; also "than" when comparing
When to use each case
nominative
the plain dictionary form — the doer of the sentence
genitive
the owner — whose it is
accusative
a specific, known object — whom or what
dative
direction or recipient — to where, to whom
locative
where it is; also having — mende bar, "I have it"
ablative
where it comes from; also "than" when comparing

The endings are the same ones the pronouns wear — that page explains when each case is used.

With an owner

One ownedSeveral owned
mymerkemmy measure of grainmerkelerimmy measure of grains
yourmerkengyour measure of grainmerkeleringyour measure of grains
his / hermerkesihis / her measure of grainmerkelerihis / her measure of grains
ourmerkebizour measure of grainmerkeleribizour measure of grains
you all'smerkegizyou all's measure of grainmerkelerigizyou all's measure of grains
theirmerkeleritheir measure of grainmerkeleritheir measure of grains

The overlap in the last rows is real, not a mistake: merkeleri can mean "his / her measure of grains", "their measure of grain", or "their measure of grains" — context decides.