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This article in AJ

  1. Vol. 49 No. 8, p. 415-418
    Received: Jan 10, 1956

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Nitrogen Changes Attending Various Crop Rotations on Clarion-Webster Soils in Iowa1

  1. W. V. Bartholomew,
  2. W. D. Shrader and
  3. A. J. Englehorn2



Nitrogen declines with cultivation of Clarion-Webster soil were largest under a cropping system of continuous corn followed in the order of decreasing decline by the 2-year rotation of corn and oats, the 5-year rotation with 2 years of meadow and the 3-year rotation with 1 year of meadow. Plots with high initial nitrogen lost more nitrogen and a larger percentage of total nitrogen than plots with low initial nitrogen.

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