i<.\i)io-Ac;ri\i-: fission-products i\ rm: hlmax food chain 



would .scfin ihat it nou got a variation of about seven-fold fur uptake on various 

 soils, I would iliiiik. just guessing, that you would have about a ten-fold increase in 

 residual aerial loam if you consider the lower ratios, which we have compared with 

 those in Britain. So we have a ten-fold increase in the aerial residual, and we have 

 a seven-fold increase in the root crops, because of poorer soil. It does not look too 

 good, even though we arc better oil in tliat wc have lower levels of fall-out. 



Dr. Loutit: It is this sort of thing that I had in mind when I started off by saying 

 that anything that I said was only relevant to Britain. I think that we there, by 

 means of the combination of field survey and experiment, have been able to get 

 down to this sort of calculation. The only thing that I can suggest for local conditions 

 is. that you make some sort of experimental appreciation, as well as carrying on the 

 survey observations, and then you will also have a calculation that can be applied to 

 local conditions. 



Professor Titterton: Could I just comment on that, Mr. Chairman? The integral 

 experiment has been done, differential experiments have not been done, but the 

 numbers which I gave yesterday (Paper 16), which are typical, naturally, of the 

 growing areas in Australia, for things such as cabbages, milk, soil samples and sheep 

 bones, show quite clearly that the ratios are in the right direction. There is certainly 

 no factor of 10 — there might be a few per cent one way or the other. But our levels in 

 food-stuffs, in milk, compare very well with the expected levels you would get from 

 an actual fall-out. So I think you can rest assured that a factor of 10 is not going to 

 turn up. It may be 20 per cent, or something like that. 



220 



