. Bulletin - Massachusetts Agricultural Experiment Station. Agriculture. PHOSPHATES IN MASSACHUSETTS AGRICULTURE. 145 Asparagus â Com'parative Results, Phosphoric Acid and Potash, 1914. (Yield and Increase per Plot. ^) Acid Phosphate. Amount applied per Plot (Pounds). Yield. Pounds. Ounces. None, , , , 404 420 436 436 Increase. Pounds. Ounces. Muriate of Potash. None, , , ,. ' Oae-twentieth of an acre. The objection may possibly be raised â as in the case of the soil test work, in which some of the results cited for corn and other crops were obtained â that the pot
. Bulletin - Massachusetts Agricultural Experiment Station. Agriculture. PHOSPHATES IN MASSACHUSETTS AGRICULTURE. 145 Asparagus â Com'parative Results, Phosphoric Acid and Potash, 1914. (Yield and Increase per Plot. ^) Acid Phosphate. Amount applied per Plot (Pounds). Yield. Pounds. Ounces. None, , , , 404 420 436 436 Increase. Pounds. Ounces. Muriate of Potash. None, , , ,. ' Oae-twentieth of an acre. The objection may possibly be raised â as in the case of the soil test work, in which some of the results cited for corn and other crops were obtained â that the potash being used at a greater rate per acre than the phosphoric acid, the comparison may be misleading. If, however, phosphoric acid be the element present in minimo, certainly even a very moderate apphcation should give a notable increase in crop; and further, if it be the element in minimo and our application be too small, no amount of potash could exercise much effect, for it cannot take the place of phos- phoric acid. Yet further, in view of the facts that the ratio of phosphoric acid to potash is 1 to 3 in the crop (spring shoots), while in our apphcations the ratio between the two is 1 to , it can scarcely be urged that we are using phosphoric acid in disproportionately small amounts. So]) Beans, Oats and Rye. â â Soil test experiments with soy beans have given much larger increases in crop with potash than with phosphoric acid. Similar experiments with oats and rye have shown a relatively small superiority for the potash. Neither is the dominant element for these crops. Cniciferce. â Absolutely the only crops which have ever responded in our soil test work more largely to an application of phosphoric acid than to one of potash are those belonging to CrKciferce, such as the cab-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfec
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