yy It varies tremendously from place to place. What I was getting after is what appeared to ae to be the most valid. Available calcium may be equal to the calcium that goes into grass. This 4s available calcium in tilled eoil emf soil that is under cultivation. It is just like Jerry Hill trying to take Eisenbudts data, the number of places at which you have made the masurenent is the emall part of the earth's surface. This varies tremendously with your leeation. Yes, but we have it figured for average plants. Just use an average ~ but realise what you are doing. Is this going to affect the number of bombe linearly? NTSB Yes, sir. is avallabliity synonomous with exchangeable? Of course, you are leading up to encther question and that is whether the deposited strontium ia uniformly atxed with the available caleiung which I think would be a big question mark. This comes on the surface and the plants you are feeding the roots Gam two or three fest below, you wouldn't get mixing. I think the atuff is pretty well. fixed an the tep 2 er 3 inches. Wouldn't rain sveep it down? No, I think the finding is that caleium and strontium are fixed pretty well to the ecdl particles and the movement is practically nil. Mr. Larson has some data on that. om BOE ARCHIVES