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This group includes elements that are used as nutrients by only a limited number of plant species.  When high concentrations of an element, not commonly found in most plants, is seen in a particular species, it raises the possibility that the element is essential for that species.  The plants may use these for non-nutritional purposes.  It is thought that species where these elements are present may use them for protection against invading bacteria. For example, Barium is found in brazil nuts; Aluminum in tea; Chromium, Nickel and Cobalt in gramineae; Silicon in rice and cucumbers.

 

VANADIUM  (V) 50.94 Atomic Weight

(Essential Trace Element)

Vanadium is an element that is found combined in about 65 minerals.  It is the 22nd most abundant element constituting the earth’s crust.  80% of all Vanadium produced is used as an additive in the steel industry.  Vanadium steel is especially strong, hard, and has great resistance to shock loads.  It is also used in super conducting magnets.

In plants, Vanadium is an essential trace element, but in limited quantities, as some of its compounds are toxic.  Vanadium is required by certain algae.  Recent studies have indicated that Vanadium has a tendency to ‘impersonate’ Phosphorus.  Plant roots apparently cannot differentiate the two.  In soils of high Vanadium content, that plant will take in the Vanadium when supplies of Phosphorus are limited.  While Vanadium has been proven useful to some plant species, in corn, soybean, tomatoes, and other crops, it has been found useless.  In soil testing, Vanadium has been found to be the source of inaccurate Phosphorus testing, thereby skewing crop nutrient recommendations.  New parameters for soil testing procedures are available that include tests for Vanadium.