. Annual report. Agricultural education. 162 EXPERIMENT STATION. [Jan. Average Yields per Acre (Pounds'). Plots. Hay. Rowen. Plots 1 and 3 (manure alone) Plots 2 and 4 (manure and potash) 3,736 3,190 2,518 2,400 It will be noticed that the hay crop on the combination of manure and potash is less than on the larger quantity of manure alone in both cases, the average difference being at the rate of 646 pounds per acre. The rowen crops are more nearly equal, the average difference amounting to only 118 pounds per acre in favor of the larger application of manure. The heavier application of manure
. Annual report. Agricultural education. 162 EXPERIMENT STATION. [Jan. Average Yields per Acre (Pounds'). Plots. Hay. Rowen. Plots 1 and 3 (manure alone) Plots 2 and 4 (manure and potash) 3,736 3,190 2,518 2,400 It will be noticed that the hay crop on the combination of manure and potash is less than on the larger quantity of manure alone in both cases, the average difference being at the rate of 646 pounds per acre. The rowen crops are more nearly equal, the average difference amounting to only 118 pounds per acre in favor of the larger application of manure. The heavier application of manure means, of course, a larger application of nitrogen. It is not surprising, therefore, that the first crop, which includes a considerable proportion of timothy and redtop, is heavier where the manure is most largely used. The rowen crop is made up in much larger proportion of clover, and the proportion of clover is greater where the lesser quantity of manure and the potash salt are applied. Estimating the manure to cost on the land $5 per cord and the high-grade sulfate of potash at the market rates, the usual annual difference in cost of materials ap- plied has amounted to about $6 to $ per acre, the lesser amount of manure and potash costing about that amount less than the larger application of manure. This experiment has now continued sixteen years. Dur- ing this time ten corn crops have been raised. The average yields per plot and the averages for the two systems of manuring are shown in the following tables: — Average Yields per Stover (Pounds). Plot 1 (manure alone), . Plot 2 (manure and potash), Plot 3 (manure alone), . Plot 4 (manure and potash), 4,929 4,579 4,292 4,104. 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 perfectly resemble the original Massachusetts Agricultural College; Massachusetts Agricultural Experime
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