'Ground' in the Bible

Then Ezra blessed the Lord, the great God. And all the people answered, “Amen, Amen!” while lifting up their hands; and they knelt down and worshiped the Lord with their faces toward the ground.

and [we obligate ourselves] to bring the first fruits of our ground and the first fruits of all the fruit of every tree to the house of the Lord annually,

We will bring the first [and best] of our dough, our contributions, the fruit of every tree, the new wine and the [olive] oil to the priests, to the chambers of the house of our God, and the tithe of our ground to the Levites, for the Levites are the ones who receive the tithes in all the rural towns.