The selenium content of vegetation and the mapping of seleniferous soils
1942
Olson, O.E. | Jornlin, D.F. | Moxon, A.L.
The selenium content of Agropyron smithii and some other plants has been found to remain fairly constant during the stages of growth up to maturity, following which it decreases rapidly. The selenium content of Agropyron smithii appears to be a relative index to the amount of selenium in soils which is available to common range plants. A convenient method for differentiating between areas of high and low "available" selenium in soils has been devised. This method, it appears, will prove practicable only where detailed work is essential, geological studies being better suited for work of a reconnaissance nature.
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