Bulletin - Agricultural Experiment Station Volume 231-244

Bulletin - Agricultural Experiment Station Volume 231-244

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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. 1921 edition. Excerpt: ...which have included several hundred samples taken from nearly all the counties in this state, it has been found that the best types of soil usually contain the largest amounts of calcium, phosphorus, sulfur and manganese and the poorest have the lowest. 5. The easily soluble calcium, that is the portion soluble in weak nitric acid (0.2N) and in carbonated water has also been determined in many samples. Some distinctive differences were found in the relative solubility of this element in the soils from different areas. 6. Many soils were found to be so low in calcium that their deficiency in this constituent requires consideration as well as their low phosphorus and nitrogen supply. 7. The application of one or two tons of limestone or of rock phosphate per acre to some soils adds about as much calcium as the surface soil contains. If these materials are found to be beneficial on such soils, the question arises, what part of such benefits can be attributed to the plant-food calcium which these materials supply apart from other useful functions which they perform? REFERENCES (1) Association of Official Agricultural Chemists, Doolittle, R. E., Chairman of the Committee on Revision of Methods. 1920. Official and Tentative Methods of Analysis of the Association of Official Agricultural Chemists, p. 315. Published by the Association, Washington, D. C. (2) Association of Official Agricultural Chemists, Wiley, H. W., editor, 1908. Official and Provisional Methods of Analysis, U. S. Dept. of Agriculture, Bur. Chem. Bui. 107, revised, p. 15. (3) Cyclopoedia of American Agriculture, 1907, Bailey, L. H., editor, v. 1, p. 481-2. The MacMillan Co, New York. (4) Duggar, B. M., 1919. Plant Physiology, pp. 175-180. The MacMillan Co., New York. (5) Frear, ..
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Product details

  • Paperback | 144 pages
  • 189 x 246 x 8mm | 268g
  • United States
  • English
  • black & white illustrations
  • 1236747097
  • 9781236747099