Report of Work of the Agricultural Experiment Station, Middletown, Conn., 1877-8; With an Account of Field Experiments with Fertilizers by Wilbur Olin Atwater
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1879 Excerpt: ...indifferent, but mostly very poor. The average results are given below. Those of the nine trials with potatoes in Table II are appended for comparison. The proportions per acre varied in some cases, as may be seen from the details in the full report, but not enough to materially affect the general result. The variations with the same fertilizer were of course very wide. On the whole, the complete fertilizer, No. VI, brought the largest average yield, 48.6 bushels per acre, excelling even the farm manures, which, varying, of course, in amount and composition, brought, on the average 46 bushels. Next came the mixture of superphosphate and potash salts, with 43 bushels. Taking into account the cost, $9.75, this was the most profitable of all. The complete fertilizer brought, on the average, 5.7 bushels more per acre, but this was hardly enough to cover the extra cost of the nitrate of soda, $5.63. The complete fertilizer seemed to be These estimates are on basis of market prices plus $5.00 per ton for freight and application. fully as reliable as the farm manures, the mixture of superphosphate and potash salt but little less so. The mixture of nitrate of soda and superphosphate failed much oftener, and averaged less in product, only 39 bushels. The superphosphate, by itself, frequently brought fair crops. The muriate of potash sometimes brought a very marked increase, but oftener failed. Nitrate of soda alone seldom had much effect. The Special Effects Of Phosphoric Acid, Potash, And Nitrogen On Corn Are plainly shown in Table III. Taking into account the 27 experiments of 1878, and Nos. Bl and B2 of 1877, in all 29 corn experiments, and averaging in each trial, the effects of the same material on the different plots, per Table III, it appears that: 1. Effect ...
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