Historical challenge prizes

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6. Substitute for Guano Prize

Year: 1852
Promoter: Royal Agricultural Society for England
Prize: £1,000 (Today's value $132,000)
Winner: Unknown

The Royal Agricultural Society for England wanted to find a discovery of a manure equivalent in fertilising properties to Peruvian Guano. 

Peruvian Guano was a very expensive imported substance to purchase and demand was high.