Beschrijving
It is the ambition of most farmers to produce the largest possible yields of which the land is capable, provided that the cost of production allows a sufficient income to warrant the extra labor required to produce the larger yield. In the humid areas the increased yield is accomplished to a large extent by the use of manure and such other methods as will encourage plant growth. On the irrigated lands, many are trying to force increased yields by the increased use of water, rather than by other means.
Fritz Knorr, Superintendent, of Office of Western Irrigation Agriculture in 1915 wrote a 24-page guide \