Why are single plant yields of sweetpotato highly variable within plots

1943

A:PS

1. Details of growth and ultimate yields of individual sweetpotato plants were recorded in replicate plots set the same day with rooted and non-rooted cuttings from selected and from random lots of roots, and set with draws or sprouts from random lots of roots. 2. Five tests in three locations during two years embraced a total of 8000 individual plant records. 3. Yields per plant were not consistently correlated with kind of propagating piece or portion of the mother root from which cuttings or sprouts were derived. 4. Little to practically none of the variation in yield per plant could be associated consistently with any evident feature of the individual propagating piece or the newly established normal plant in the field. 5. The cause of great differences in yield of normal plants within a plot is still unknown. [AS]

v.43:249-254, AMERICAN SOCIETY FOR HORTICULTURAL SCIENCE, PROCEEDINGS

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