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Influence of potato specific gravity on yield and oil content of chips

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Abstract

Tubers from bulk samples of Norchip potatoes were separated into specific gravity groups by weighing each tuber in air and then in water. Forty-nine chipping samples were assembled according to specific gravity from the segregated tubers (1.060 to 1.110 specific gravity). Chip yield increased and chip oil content decreased linearly through a specific gravity of 1.110. The contribution of specific gravity to chip yield was demonstrated by expressing chip yeild on a zero percent oil basis. For all lots of Norchips tested, the specific gravity distribution was similar, and all standard deviations (s) were the same (0.0064). Using s, a table of tolerances was compiled for estimation of the appropriate sample size for routine specific gravity determinations.

Resumen

Tubérculos de muestras a granel de papas Norchip fueron separadas en grupos, en base a gravedad específica pesando cada tubérculo en aire y luego en agua. Cuarenta y nueve muestras chip fueron montadas de acuerdo a gravedad específica de los tubérculos segregados (1.060 a 1.110 de gravedad especifica).

El rendimiento para chip aumentó y el contenido de aceite disminuyó linealmente hacia 1.110 de gravedad específica.

La contribución de la gravedad específica al rendimiento en chip fue demostrada expresando el rendimiento chip en base a cero por ciento de aceite.

Para todos los lotes de Norchip probados la distributión de la gravedad específica fue similar y todas las desviaciones standard (S) fueron las mimas (0, 0064).

Usando S, una tabla de tolerancia fue recopilada para la estimación del tomaño de muestra apropiado para determinaciones rutinarias de gravedad específica.

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A laboratory cooperatively operated by the North Central Region, Agricultural Research, SEA, United States Department of Agriculture; the Minnesota Agricultural Experiment Station; the North Dakota Agricultural Experiment Station; and the Red River Valley Potato Growers’ Association.

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Lulai, E.C., Orr, P.H. Influence of potato specific gravity on yield and oil content of chips. American Potato Journal 56, 379–390 (1979). https://doi.org/10.1007/BF02855348

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  • DOI: https://doi.org/10.1007/BF02855348

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