American Potato Journal

, Volume 46, Issue 3, pp 69–74 | Cite as

Effects of fertilizer on yield and quality of Norland potatoes in northeastern Saskatchewan

  • H. G. Zandstra
  • R. H. Anderson
  • W. K. Dawley


Fertilizer combinations designed to study the effects of phosphorus, potassium and sulfur on yield, early tuber yields, and quality of potatoes were tested in each of three consecutive years at two sites in northeastern Saskatchewan. Yield responses to fertilizers varied from 0 to 136 cwt/acre and averaged 73 cwt/acre. Phosphorus fertilizer requirements of potatoes were lower for the Nipawin soil type (0–35 lb P/acre) than for the Melfort soil (35–140 lb P/acre) and were related to available phosphorus levels in the soil.

Fertilizer containing potassium (50 lb K/acre) consistently increased early tuber yields at both sites. Yields of potatoes harvested at maturity were significantly increased by potassium at Nipawin. At Melfort, potassium fertilizer did not increase yields when potatoes were harvested at maturity. Over-fertilization with nitrogen reduced early tuber yields at Nipawin on two occasions.

All fertilizer combinations significantly reduced specific gravity of potatoes, compared to the unfertilized checks. Increasing the rates of phosphorus and adding potassium generally decreased specific gravity. These effects were, however, not significant in the three-year averages. Differences in specific gravity of up to 0.006 were not reflected in overall quality ratings for boiled or baked potatoes.

The addition of sulfur from gypsum did not affect early yield, final yield, or specific gravity at either site.


Specific Gravity Final Harvest Phosphorus Fertilizer Potassium Fertilizer Triple Super Phosphate 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Durante tres años en dos locaciones del noreste de Saskatchewan se han llevado a cabo experimentos con varias combinaciones de abonos cuyo fin era él de estudiar los efectos de fósforo, potasio, y azufre sobre el rendimiento, el rendimiento temprano y sobre la calidad de papas. La reacción del rendimiento varió de 0 a 136 cwt/acre y fué en promedio 73 cwt/acre. Los requirimientos de fósforo fueron más bajos para el tipo de suelo Nipawin (0–35 lb P/acre) que para el suelo Malfort (35–140 lb P/acre) y estaban relacionados a los niveles de fósforo disponible en el suelo.

Abono que contenía potasio (50 lb K/acre) consistemente incrementó el rendimiento de tubérculos tempranos en las dos localidades. Los rendimientos de papas cosechadas cuando maduras fueron notablemente incrementados con la aplicación de potasio en Nipawin. En Melfort el abono de potasio no incrementó el rendimiento cuando las papas se cosecharon maduras. Demasiado abono de nitrógeno redujo la cosecha temprana de tubérculos dos veces in Nipawin.

Todas las combinaciones de abono redujeron significativamente la gravedad específica de las papas en comparación con los controles no abonados. Incrementando las proporciones de fósforo y añadiendo potasio resultó en general en la reducción de gravedad específica. Sinembargo estos efecvtos no fueron significantes en los promedios de los tres años. La reducción de gravedad específica hasta 0.006 no se reflejó en la calidad de las papas cocidas o fritas.

La adición de azufre bajo la forma de yeso no tuvo efecto alguno sobre rendimiento temprano, rendimiento final, ni la gravedad específica en las dos localidades.


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Literature Cited

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Copyright information

© Springer 1969

Authors and Affiliations

  • H. G. Zandstra
  • R. H. Anderson
  • W. K. Dawley

There are no affiliations available

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