American Potato Journal

, Volume 29, Issue 6, pp 136–141 | Cite as

The effect of tillage practices on the yield of Irish cobbler potatoes

  • Walter C. Jacob
  • M. B. Russell


  1. 1

    Various types of tillage implements including the killifer sub-soil chisel, the jostler subsoil cultivator, the TNT subsoil plow, the conventional moldboard plow and the disk harrow were evaluated as to their influence on the yield of Irish Cobbler potatoes over a four-year period.

  2. 2

    Disking only consistently reduced the yield of potatoes compared to plowing, or TNT plowing.

  3. 3

    The only significant effects of killifer treatments was a reduction in yield of potatoes when the frequency and intensity were too great.

  4. 4

    Except for 1949 there was no significant increase in yield by irrigation.

  5. 5

    Annual killifer treatments seemed to be more beneficial when combined with irrigation and TNT plowing than killifering once in four years.

  6. 6

    More studies regarding the economics of deep tillage operations in the Northeast need to be conducted.



AMERICAN Potato Journal Tillage Practice Tillage Operation Primary Tillage Tuber Unit 
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Literature cited

  1. 1.
    Klute. A. & W. C. Jacob. 1949. Physical properties of sassafras silt loam as affected by long-time organic matter additions. Soil Sci. Soc. of Amer. Proc. (1949) 14: 24–28, 1950.Google Scholar

Copyright information

© Springer 1952

Authors and Affiliations

  • Walter C. Jacob
    • 1
  • M. B. Russell
    • 2
  1. 1.Cornell UniversityLong Island Vegetable Research FarmRiverhead
  2. 2.Cornell UniversityIthaca

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