a total over to the matrix which survoundcs the root, and we attonst to relate tho concentration fnctos hore to that incediate root “sing the nutrient in at i cd Hoo] et ty ww ia <4 ry feal it ives a nuch create 2 We have a rough method of cstimating this, but we Ss exvironuent. censaragisc, very brict sanple, yorhars a srecies, be “gq 9 < @ 3 oo tg he @ yy eo ‘3 (w) 0 * Yi r i pte 3 +) (2 by Strontiun is pretty wnifornly distributed, kas perhays a ten-fold variation. oveor of ten, ° cr ju. a QO eb p 3 oO s) “3 2 betvecn, porhnans, rons 9 Ww) general, Caecsinm In coneval, with this acnittediry difference of magnitrde is on the Cne crdow of magnitude exists botveon different 2 Yan suro if you lecok far enough, you can find some ° that excesded this, but this scems to to tho gencral limit of the effoct of cifferent svecios, . Likevise, diiferent orsanisms, cifierent parts of tho plant chow differing upiakes, and you will soa in general the leaves are the highest part of the plant, nate because leayes are a nice This is perhaps fortu- thing fer sampling. It is alvays interesting to know that in goneral the ssed portion, the sesd has the lowest concentratien, This is trua because in so nany —, instances we do use tho seca part for human conswaption, The next slides shows the effest of Pics the sluzs become more acid or is adjusted to become more acid, and you have @ more rapid upiaks, Whether this is a physiocloctical ressonse of the plant or a solubility phenomenon, we have not spent tine