. Dairy farming : being the theory, practice, and methods of dairying. Dairy farms; Dairy plants; Milk plants. SAND (CULTURE. 137 precisely the same circumstances, except that no potash was sujiplied, led a starvino; and sickly life, and attained a height of scarcely 3 inches. Without potash no full development was possible. When tins was added later (in ), the plant revived, pushed out with some vigour, but was unable to overtake its better-fed neighbours. Nor did the plants grow well in lack of either lime (IX.), or chlorine (X.), or nitrogen (XI.). . These are the results, not of single
. Dairy farming : being the theory, practice, and methods of dairying. Dairy farms; Dairy plants; Milk plants. SAND (CULTURE. 137 precisely the same circumstances, except that no potash was sujiplied, led a starvino; and sickly life, and attained a height of scarcely 3 inches. Without potash no full development was possible. When tins was added later (in ), the plant revived, pushed out with some vigour, but was unable to overtake its better-fed neighbours. Nor did the plants grow well in lack of either lime (IX.), or chlorine (X.), or nitrogen (XI.). . These are the results, not of single, but of many repeated trials. Dr. Nobbe made, in this case, a number of different series of experiments, each acid, and some compound of nitrogen. Besides these, chlorine, and perhaps silica, are sometimes, if not always, indispensable to complete develop- ment. If any one of these essential ingredienti be lacking, the plant will suffer in growth and ; The results of these experiments, wliich should be clearly stated, and wliich should be especially remembered, are that—1st. No agricultural plant can grow without an abundant supply, in an available and appropriate form, of each of the essential ingredients of plant-food. 2nd. Of thesej. Fig. 44.—ExPEBiMEirr with Buckwheat and Oats grown in Barren Sand, and supplied with DIFFERENT FERTILISING INGREDIENTS. corresponding to the numbers I., II., &c. There were, for instance, several of series I., some larger, and others smaller. From these, I. and I.« were selected as of average size and development. So II., III., &c., were each selected as fair average samples of the plants of those series. The selected plants were photographed, and the result is shown in the picture. "IMany such series of experiments have been carried on with various plants by Nobbe and numerous other investigators, and they all agree in this one general conclusion. No agricultural plant can attain full growth without a suffici
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