German phosphorous bombs

The Germans, the Luftwaffe, had started dropping a lot of bits of paper coated with phosphorous but with, very wet, soaking wet, dropping them out of planes over farmers fields in England as well as bombs, they were dropping these things. The idea was when the phosphorous, they settled on the ground in the wheat fields and so on, the sun would dry them out and the phosphorus would ignite spontaneously and set fire to the fields and this was going to cause great havoc to the, not only the food industry in Britain but smoke and everything else you see. It was a very ingenious scheme.