Back where I came from, the Jerusalem Hills, you never see olive trees in orderly rows.
They just grow scattered all over the terraced hills.
So when I saw these long rows in a wadi in my new home of Meitar in the Negev, I had to investigate.
Fortunately there were plaques.
So! It is the Olive Tree Park of Meitar, funded in 2009 by the Friends of the Keren Kayemet/Jewish National Fund in Germany.
They wrote WITH LOVE AND IN RECOGNITION OF ISRAEL'S PLANTING NEW COMMUNITIES IN THE NEGEV.
I still have to find the tower but meanwhile here is an article about it and its dedication.
The blessing on the sign is from the Torah, Numbers 6:24:
יְבָרֶכְךָ יְהוָה, וְיִשְׁמְרֶךָ
"The Lord bless you and keep you" (keep as in keep you safe, e.g. from forest fires!).
As a resident told the visiting Germans, "The Olive Tree Park creates a real bond between the people who live in Meitar and the people who feel connected to Israel in Germany."