Agricultural Arithmetic

Agricultural Arithmetic

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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. 1916 edition. Excerpt: ...examination of a fine sandy loam showed that it consisted of 59.4 parts, by weight, of sandf; 33.2 parts of silt; and 7.4 parts of clay. How many ounces each of sand, silt and clay are contained in two pounds of this class of soil? 7. A sample of silt loam soil was found by a mechanical analysis to consist of 3.8 pounds of coarse and fine sand; 15.7 pounds of silt; and 5.5 pounds of clay. This class of soil consists of what per cent of sand? Of silt? Of clay? 8. How many soil particles (clay), each measuring 0.0005 of a millimeter in diameter, will be required to span one linear inch? 9. How many fewer particles would it require to span a linear inch if they were silt particles measuring.01 of a millimeter in diameter? 10. Weigh out an amount of dry soil equal in weight to a new nickel. Divide this amount of soil into five equal "Heavy" "soil--a soil hard to work, like clay. "Light" soil--a soil easy to work, like sand. tSand--the coarser soil particles. Silt--the medium sized soil particles. Clay--the finest of soil particles. portions. Each portion weighs one gram. What part of an average thimbleful does one gram of dry soil make? 11. A scientist was able to estimate 70,500,000 soil bacteria in one gram of a rich garden soil, and only 50,000 in the same amount of poor soil. How many more bacteria were contained in the gram of rich soil? The rich soil contained how many times the number of bacteria found in the poor soil? 12. One gram of soil near the surface of a fertile field was found to contain 56,250,000 soil bacteria, and only 15,000 were found in the same quantity of soil taken 3 feet Figure 13.--One Way of Breaking a Marsh. After drainage cultivation is the next step in reclaiming a marsh. The wild sod must be...show more

Product details

  • Paperback | 56 pages
  • 189 x 246 x 3mm | 118g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236493575
  • 9781236493576