Cows & Grass. When animals, including milk cows, eat plants containing strontium 90, they reject it selectively in favor of calcium. Therefore milk contains less strontium 90 in proportion to ...

Agricultural Research Council Radiobiol. Lab. Rep. 1, Strontium-90 in Human Diet in the United Kingdom 1958. Scott Russell, R., Nature, 182, 834 (1958). Steinhauser ...

VOSE and Koontz 1 have suggested that because mixed legume-grass herbage contains a higher level of strontium ... dairy cows to an all-grass diet if the level of strontium-90 in milk ever rose ...

President Kennedy last week argued that milk is a good buy. He gently reassured the strontium 90 worriers: “The cow itself, along with other factors, makes our milk very safe.” And he tut ...

Strontium refers to the radioactive isotope strontium-90. Dairy cows that eat grass contaminated with strontium then produce milk laced with it that can then affect humans who drink it.