Bulletin - North Carolina. Dept. of Agriculture Volume 41

Bulletin - North Carolina. Dept. of Agriculture Volume 41

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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. 1920 edition. Excerpt: ...pounds of straw. The value of the increase over the cost of the lime was $2.44. Lime with complete fertilizer. NTKL (Plat 19). In the case of both grain and straw, lime in combination with nitrogen, phosphoric acid, and potash gave larger yields each year than did any other treatment. The average increase was 11.5 bushels of grain and 1120 pounds of straw. The value of the increase after subtracting the cost of the fertilizer was $26.58. Taking the experiments as a whole the average results show that: The combination of nitrogen and potash did not increase the yield enough to pay for the fertilizer. That nitrogen and phosphoric acid gave 2.5 bushels of grain and 480 pounds of straw more than did nitrogen and potash. Phosphoric acid and potash gave 1.2 bushels of grain and 270 pounds of straw more than did nitrogen and phosphoric acid. Using all three plant food materials gave larger yields than any two plant food materials tried, but not enough increase to give as much profit as did phosphoric acid and potash. The yields for lime alone, although greater than on the unfertilized plat, showed such a small increased yield per acre that one would not be justified in using this material alone in the production of wheat. Taking in consideration the difference secured in the yields on plat 5 (NPK) and plat 19 (NPKL) lime is a good paying investment used with fertilizer for the growing of wheat. TABLE 11. RESULTS OF FERTILIZER EXPERIMENTS WITH WHEAT AT BUNCOMBE FARM, SHOWING EFFECTS OF VARYING QUANTITIES OF NITROGEN ON YIELDS Result From Field A (Bottomland) in 1912 and 1918 Effect of Varying Quantities of Phosphoric Acid on Bottomland The above experiments (Table III) were planned to show the effect on the yields of wheat, of varying quantities...show more

Product details

  • Paperback
  • 189 x 246 x 6mm | 227g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236818741
  • 9781236818744