(1) If a plot of land together with its inventory is the subject of usufruct, then the usufructuary may alienate the individual inventory items within the limits of proper management. The usufructuary is to obtain replacements for the normal loss by wastage and for the items eliminated under the rules of proper management; the items the usufructuary acquires, on being incorporated into the inventory, become the property of the person to whom the inventory belongs.
(2) If the usufructuary assumes the inventory at its estimated value with the duty of returning it at its estimated value upon termination of the usufruct, the provisions of section 582a apply accordingly.