Note 3 — Cultivation.
Reading edition
The oil so returned is without manurial value and, if left in the seed, is so much money wasted. The rational process, of course, calls for the return of the press cake, either direct or in the form of manure after it has been fed. With this is also secured the hull, rich in both the potash and the phosphoric acid3 which we now know is so essential to the future welfare of the grove.