Emily Dickinson's "Four Trees — upon a solitary Acre —"

I like this poem a lot. Emily Dickinson's Four Trees — upon a solitary Acre —:

Four Trees — upon a solitary Acre —
Without Design
Or Order, or Apparent Action —
Maintain —

The Sun — upon a Morning meets them —
The Wind —
No nearer Neighbor — have they —
But God —

The Acre gives them — Place —
They — Him — Attention of Passer by —
Of Shadow, or of Squirrel, haply —
Or Boy —

What Deed is Theirs unto the General Nature —
What Plan
They severally — retard — or further —
Unknown —