ağaç

/aʁatʃ/

Cases

SingularPluralWhen to use it
nominativeağaçthe treeağaçlathe treesthe plain dictionary form — the doer of the sentence
genitiveağaçnıthe tree'sağaçlanıthe trees'the owner — whose it is
accusativeağaçnıthe tree (as the object)ağaçlanıthe trees (as the object)a specific, known object — whom or what
dativeağaçhato the treeağaçlağato the treesdirection or recipient — to where, to whom
locativeağaçdaat / in the treeağaçladaat / in the treeswhere it is; also having — mende bar, "I have it"
ablativeağaçdanfrom the treeağaçladanfrom the treeswhere 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
myağaçımmy treeağaçlarımmy trees
yourağaçıngyour treeağaçlarıngyour trees
his / herağaçıhis / her treeağaçlarıhis / her trees
ourağaçıbızour treeağaçlarıbızour trees
you all'sağaçığızyou all's treeağaçlarığızyou all's trees
theirağaçlarıtheir treeağaçlarıtheir trees

The overlap in the last rows is real, not a mistake: ağaçları can mean "his / her trees", "their tree", or "their trees" — context decides.