In this way, the land became Pharaoh's
"So the land became Pharaoh's"
It was only the land of the priests that Joseph did not buy
"But he did not buy the land of the priests"
the priests were given an allowance
An "allowance" is an amount of money or food that someone regularly gives to another person. This can be stated in active form. AT: "Pharaoh gave the priests a certain amount of food each day" (See: rc://en/ta/man/translate/figs-activepassive)
They ate from the allotment which Pharaoh gave them
"They ate from what Pharaoh gave them"