Farm Chemicals Volume 56

Farm Chemicals Volume 56

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1922 edition. Excerpt: about 1 per cent, yearly, while that of the rice fields cultivated is only 0.4 per cent. Consequently, unless Japan makes an endeavor to augment the rice production by the use of fertilizers, the food question will become perplexing. The fertilizer utilized in Japan are soya bean cake, rapeseed cake, compressed herrings and sardines, bone dust, Chile nitrate, sulphate of ammonia, superphosphate, and mixed fertilizers. At the present time the superphosphate industry is carried on by 15 companies with 28 mills, the yearly production being valued at $12,500,000. The number of sulphuric acid works closely allied with the superphosphate industry is 53. Most of them are situated in the districts of Tokio and Osaka. The first company in Japan to manufacture fertilizers was formed in 1888. After the wars with China and Russia other companies sprang into existence owing to the prosperous condition of the market, and when this at last declined, several companies were amalgamated, so that those now in existence are founded on a substantial basis. There is a yearly demand for 300,000 tons of phosphates. The home production is obtained chiefly from the Isle of Rasa, but as the maximum output is only 110,000 tons per year, importation from abroad is a necessity. Recently the Isle of Angaur was acquired by Japan, and this will cause a slight fall in imports from foreign sources. However, it is stated that the deposits in this island only amount to 2,000,000 or 3,000,000 tons. Probably there are richer deposits in the province of Kiangsu (China) and in the Isle of Hirata, south of the isle of Hainan. With regard to manufacture of sulphuric acid, there are 124 works utilizing the lead chamber and tower system and eight the contact method. The total...
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Product details

  • Paperback | 358 pages
  • 189 x 246 x 19mm | 640g
  • United States
  • English
  • black & white illustrations
  • 1236821475
  • 9781236821478