Summary
Maturity of potatoes (as measured by degree of diedown of tops) was found to be more advanced in potatoes grown at low levels of nitrogen fertilization. Chip color improved as potatoes matured, but rate of nitrogen application exerted an influence on chip color which was independent of its effect on maturity. Yields increased with length of growing season, and 160 pounds of N per acre gave the highest yield.
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Hope, G.W., MacKay, D.C. & Townsend, L.R. The effect of harvest date and rate of nitrogen fertilization on the maturity, yield and chipping quality of potatoes. American Potato Journal 37, 28–33 (1960). https://doi.org/10.1007/BF02855589
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DOI: https://doi.org/10.1007/BF02855589