American Potato Journal

, Volume 64, Issue 4, pp 165–176 | Cite as

Comparison of urea and ammonium nitrate as nitrogen sources for potatoes

  • J. B. Sanderson
  • R. P. White


The performance of urea and ammonium nitrate was evaluated on Sebago, Russet Burbank and Kennebec cultivars in 12 experiments over 4 years at rates of 0, 67, 135, and 202 kg N/ha. Compared to ammonium nitrate: total yield was reduced by urea in 6 of the 12 experiments, with an average reduction of 3.3 t/ha at the 202 kg N/ha, “A” size yield was affected in 4 experiments, the percent of tubers greater than 114 g was increased by urea in 6 experiments, and urea reduced specific gravity by an average 0.005 units in 6 experiments. A multiple regression equation involving weekly mean temperature and rainfall explained 80% of the yield variation between urea and ammonium nitrate.

Key Words

Kennebec Russet Burbank Sebago yield specific gravity Solanum tuberosum fertilizers 


Se evaluó el comportamiento de la úrea y el nitrato de amonio en papas de las variedades Sebago, Russet Burbank, y Kennebec, en 12 experimentos llevados a cabo durante 4 años, con dosis de 0, 67, 135 y 202 kg N/ha.

En comparación con el nitrato de amonio, la úrea redujo el rendimiento total, en 6 de los 12 experimentos, con una reducción promedio de 3,3 t/ha a la dosis de 202 kg N/ha; el rendimiento en tubérculos de tamaño “A” se vio afectado en 4 de los experimentos y el porcentaje de tubérculos más grandes que 114 g fue incrementado en 6 experimentos; de otro lado la úrea redujo la gravedad específica en un promedio de 0,005 unidades, en 6 experimentos.

Una ecuación de regressión múltiple, incluyendo temperaturas medias semanales y precipitación, permitió explicarse el 80% de las variaciones en rendimiento entre la úrea y el nitrato de amonio.


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Copyright information

© Springer 1987

Authors and Affiliations

  • J. B. Sanderson
    • 1
  • R. P. White
    • 1
  1. 1.Agriculture CanadaCharlottetown

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