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This article in SSSAJ

  1. Vol. 20 No. 4, p. 526-528
    Received: Aug 13, 1955



The Effect of Green and Stable Manure on the Yield of Crops and on the Physical Condition of a Tappan-Parkhill Loam Soil1

  1. J. R. Guttay,
  2. R. L. Cook and
  3. A. E. Erickson2



The effect of sweet clover-green manure and stable manure on the yields of grain and row crops have been studied since 1936. The treatments include the application of these manures every 2, 4, and 6 years. Sweet clover-green manure had a more beneficial effect on the yield of crops than did stable manure. The greatest effects of both manures on crop yields occurred where the manures were applied every 2 years. In the 4- and 6-year treatments, marked beneficial effects were noted immediately following, or 1 year after the application of the manures, with much less or no benefit occurring thereafter until reapplication.

The effects of these treatments on the physical condition of the soil have been studied for 2 years. Granulation of the soil was enhanced by the 2-year treatments. The effects of the treatments on the soil physical condition cannot be completely evaluated until a 6-year study is completed.

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