Most cosmic rays, however, do not have such extreme energies; the energy distribution of cosmic rays peaks at 0.3 gigaelectronvolts (4.8 Ã 10 â11 J).
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Botany and Plant Pathology, Purdue University. E-mail: lembi@purdue.edu. The use of barley straw for algae control has received a lot. of publicity in recent years. It is now common to find small. barley bales being sold in nurseries and garden shops for use in. water gardens and small pools to control algae. The word-of-. mouth reports of success with this method have led many people. to suspect that barley might also control algae in ponds and. lakes.