A Rapid and Practical Method of Determining Extractable White Sugar as may be Applied to the Evaluation of Agronomic Practices and Grower Deliveries in the Sugar beet Industry

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Abstract
Juice is expressed by hand from finely cut brei, through a cloth. The phosphate method was used to determine clear juice purity. Percent [%] solids by weight in clear juice were determined with a refractometer, and sucrose by pol in a 50 mm tube, correcting to percent by weight by using density, 20[degree] C, of solution, via refractometer. Sucrose pol of leaded expressed juice, 50 mm, was corrected to percent by weight by using locally acceptable values for percent marc and raw purity for each sample. Tables of constants are provided to prepare detailed tables to read percent sucrose, purity and extractable sugar per ton, without calculation. The percent sucrose values agree with the Sachs LeDocte method, r = 0.99 or better. The method is convenient for the analysis of research samples or the occasional sample. For grower-delivery samples it has these advantages The adherence of reasonable amounts of soil to the beets does not affect the sucrose or purity value; The brei need not be mixed, the juice may be expressed from samples in the tare house, no critical amount of juice need be obtained, and only the quick-frozen juice samples need be transported to the laboratory. One laboratory may serve several factories; No accurate weighing or measuring is used in the sucrose determination; The percent sugar and purity of composited samples agrees with the mean of the samples. If samples are composited, it is practicable to determine Na, K and amino N, as well as sucrose and clear juice purity on all farmers'' samples; Work of laboratory personnel need not be disturbed by irregular deliveries.

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