Jasper County Democrat, Volume 19, Number 31, Rensselaer, Jasper County, 15 July 1916 — Page 8 Advertisements Column 4 [ADVERTISEMENT]

LIEBIG’S FOUR LAWS Announced by the Noted German Chemist Fifty Years Ago. 1. A soil can be termed fertile only when it contains all thp materials necessary for the nutrition of plants, in the required quantity, in the proper form. 2. With every crop, a portion of these ingredients is removed. A part of this is again added from the inexhaustible store of the atmosphere; another part, however, is lost if not replaced by man. 3. The fertility of the soil remains unchanged if all the ingredients of the crop are given back to the soil. Such a restitution is effected by manure and fertilizers. 4. The manure produced in the course of farming is not sufficient to maintain permanently the fertility of a farm; it lacks the constituents which are annually sold in the shape of grain, hay, milk, and live stock.