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What happens to Brazil nuts grown in selenium poor soils?

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The most widely quoted figure is 96 mcg of selenium per Brazil nut and comes from the USDA nutrient database. This is ... The concentration of selenium in Brazil nuts has been reported to depend on the selenium concentration of the soil and the ability of the tree to absorb selenium from the soil. read more

The most widely quoted figure is 96 mcg of selenium per Brazil nut and comes from the USDA nutrient database. This is an average value, which I assume is determined from samples of Brazil nuts purchased in the USA. However, mean values such as this can hide a large amount of variation in the case of natural food products. read more

Trying to grow them almost anywhere else results in a normal, white, pungent onion. The sulfur in most soil is absorbed by the onion to create a variety of compounds which serve as a pest repellent for many species. read more

Probably, if you've read about food sources of selenium, you've read about Brazil nuts as a strong source of the mineral. Depending on where they are grown, this is likely to be true—one ounce of Brazil nuts may contain as much as 10 times the Dietary Reference Intake (DRI) recommendation for selenium intake. read more