Changes in USDA food composition data for 43 garden crops, 1950 to 1999.

@article{Davis2004ChangesIU,
  title={Changes in USDA food composition data for 43 garden crops, 1950 to 1999.},
  author={Donald R. Davis and Melvin D. Epp and Hugh D. Riordan},
  journal={Journal of the American College of Nutrition},
  year={2004},
  volume={23 6},
  pages={669-82}
}
OBJECTIVES To evaluate possible changes in USDA nutrient content data for 43 garden crops between 1950 and 1999 and consider their potential causes. METHODS We compare USDA nutrient content data published in 1950 and 1999 for 13 nutrients and water in 43 garden crops, mostly vegetables. After adjusting for differences in moisture content, we calculate ratios of nutrient contents, R (1999/1950), for each food and nutrient. To evaluate the foods as a group, we calculate median and geometric… CONTINUE READING
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