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Soil Report Volume 1-14 download torrent

Soil Report Volume 1-14. University Of Illinois at Station

Soil Report Volume 1-14
Author: University Of Illinois at Station
Number of Pages: 306 pages
Published Date: 06 Mar 2012
Publication Country: Miami Fl, United States
Language: English
Format: Pdf
ISBN: 9781130192414
Download Link: Soil Report Volume 1-14

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. 1911 Excerpt: ...the addition of phosphorus produced an increase of 8 bushels, nitrogen produced no increase, but nitrogen and phosphorus together increased the yield by 15 bushels. After six years of additional cropping, however, nitrogen appeared to become the most limiting element, the increase in the corn in 1907 being 9 bushels from nitrogen and only 5 bushels from phosphorus, while both together produced an increase of 33 bushels. By comparing the corn yields for the four years 1902, 1903, 1906, and 1907, it will be seen that the untreated land apparently grew less productive, whereas, -on land receiving both phosphorus and nitrogen, the yield appreciably increased, so that in 1907, when the untreated rotated land produced only 34 bushels of corn per acre, a yield of 72 bushels (more than twice as much) was produced where lime, nitrogen, and phosphorus had been applied, altho the two plots produced exactly the same yield (57.3 bushels) in 1902. Even in the unfavorable season of 1910 the yield of the highest producing plot exceeded the yield of the same plot in 1902, while the untreated land produced less than half as much as it produced in 1902. The prolonged drouth of 1911 resulted in almost a failure of the corn crop, but nevertheless the effect of soil treatment was seen. Phosphorus appeared to be the first limiting element again in 1909, 1910, and 1911; while the lodging of oats, especially on the nitrogen plots, in the exceptionally favorable season of 1912, produced very irregular results. In 1913, wheat averaged 6.6 bushels without nitrogen or phosphorus Table 7.--Crop Yields In Soil Experiments, Sibley Field For nitrogen For phosphorus For nitrogen and phosphorus over phosphorus For phosphorus and nitrogen over nitrogen For potassium, nitrogen, and phosphorus o..

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