Fertilizers Their Source Purchase And Use An Elementary Treatise for the Use
Fertilizers Their Source Purchase And Use An Elementary Treatise for the Use
Carroll Bradford Smith
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If several ingredients are needed, and these can be purchased to ad vantage separately, it would be better to apply them separately than to attempt home mixing, for a shovel and a barn floor \vill not mix foods evenly and uniformly. As a rule home mixing pays when compared with the purchase of low grade brands. If the manufac- turer offers HIGH GRADE fertilizers it is time and money saved to use them. WHY THE ANALYSIS DOES NOT ADD TO ONE HUNDRED PER CENT. The Vermont Agricultural Experiment Sta...tion Bulletin No. 47 says: "The question is often asked why the plant food contained in a fertilizer does not add up to 100. For instance, the average Vermont goods this year contain in a hundred, 2. 22 pounds nitrogen, 10. 93 pounds total phosphoric acid and 3. 46 pounds of potash, a total of 16. 61 pounds. Of what did the other 83. 39 pounds consist, and is it 28 needed for plant food? It will be remembered that nitrogen is a gas, and phosphoric acid and potash respectively strong acid and alkali, and that they can only be useful in combined forms.
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