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. 1910 Excerpt: ...be Potash mines at Stassfurth, Germany. Mining potash for fertilizers. coming available. It contains from 2 to 2V2 per cent of nitrogen, from 6 to 8 per cent of potash and from 3 to 5 per cent of phosphoric acid. In states where it can be secured at a comparatively low price, it can be used very profitably in making ...
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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. 1910 Excerpt: ...be Potash mines at Stassfurth, Germany. Mining potash for fertilizers. coming available. It contains from 2 to 2V2 per cent of nitrogen, from 6 to 8 per cent of potash and from 3 to 5 per cent of phosphoric acid. In states where it can be secured at a comparatively low price, it can be used very profitably in making fertilizer mixtures. Wood ashes. For many years they were the sole source of potash for fertilizing purposes, but since the introduction of the German potash salts, there is less of this material found on the market. They are valuable when unleached, containing in this condition from 2 to 8 per cent of potash. They are largely composed of carbonates of lime, magnesia and potash, with a small quantity of phosphates per cent). The ashes from soft woods contain less potash than those from hard woods. Coal ashes have practically no value for fertilizing purposes. Wood ashes have a beneficial action on the mechanical condition of light soils, mainly because of the large amount of lime they contain. This binds the soil particles together, thus increasing their capillary action and improving their tilth. On clay soils there is a tendency for wood ashes to cause "puddling." This is avoided by applying an equal quantity of land plaster with the ashes. All the materials mentioned with the exception of tobacco stems are soluble in water, so there is no such marked difference in availability as was noted in the case of nitrogenous and phosphatic fertilizers. Indirect fertilizers. There are a number of substances which are beneficial to the land under some conditions, although they add neither humus nor important quantities of plant food. Among such materials are lime, gypsum and common salt. Lime. There are very few if any soils, which do not cont...
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Add this copy of General Agricultural Chemistry: -1913 to cart. $47.11, new condition, Sold by Revaluation Books rated 4.0 out of 5 stars, ships from Exeter, DEVON, UNITED KINGDOM, published 2009 by Cornell University Library.
Add this copy of General Agricultural Chemistry to cart. $64.69, good condition, Sold by Bonita rated 4.0 out of 5 stars, ships from Newport Coast, CA, UNITED STATES, published 2016 by Palala Press.
