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PubMed1959

Distribution of radioactivity in wheat plants grown in the presence of strontium-90.

Thatcher wheat grown in soil to which Sr(90) had been added showed that accumulation of radioactivity in the kernels was about one-tenth the accumulation in leaves and stems. Experimental milling of the kernels gave brans with the largest amounts and flours with the least amounts of activity, the Sr(90) concentrations being related practically linearly to the weights of total ash in the various milling products.

Plant Leaves↗
PubMed1959

Stratospheric fallout of strontium-89 and barium-140.

A series of nuclear test explosions which occurred in the fall of 1958 caused a very large increase of Sr(89) and Ba(140) in the stratosphere. The Ba(140)/Sr(89) ratio in the stratosphere, and hence in the troposphere, has decreased steadily since then with a half-life of approximately 17 days.

Barium↗
PubMed1960

Strontium-90 in Ecuador.

Samples of bone and soil collected in 1958 show highest values for Sr90 in the tropical region on the east side of the Andes. Lowest values are found in the high central valley, where samples used in estimating world-wide distribution of fallout were collected. If the major fallout deposition occurs in the interior of the South American continent, such estimates for these latitudes may be low by as much as a factor of ten. Although there has apparently been greater Sr90 deposition in regions of greater rainfall, analysis of data from 16 locations fails to show a significant correlation between rainfall and fallout.

Ecuador↗