No coin nor oath required. For personal study only.
By N. AI. colllbcr, DSC. 2nd ed. l'p. 20s. London : E. Arnoltl & Co., 1932. 7s. Gd. llltl~oi~gli agriculture is onc of tlic olilcst of the arts, the wicntilic study of t.lic soil did not rcnlly conitiicii~c until 18.10, \vlicn Lieliig tlcnioustrntctl t.lic true tunetion of nitroger~~potiisl~ , nnd pltosphorus. Since t hcn Iio~vcvcr, o w knoivlcdgc of ngricnlturc in gciicrnl rind of tlw soil i n piirticulnr lins grown stccitlily, hiit t.lie progress lins I m n esccptionnlly r:ipitl during tlic iiiist fifteen ycnrs or so, so rqiitl in fact,, tliat as Prof. Conilicr rcninrks, it. innp friirly be cliiiinctl t,hiit t,lic stiitly of soil forniiit.ion proccsscs nntl soil types liris given t o soil sciciicc :I funileinciitnl clirrrnctcrist.ic: wliicli lins bccn properly rccogiiizctl l)y tlie ntloption of tlic \vord p(1oZoqy to tlcscrilir the acicncc of t h soil. For this reninrk:~Iilc progress no snitill credit is due to Rnssinn pctlologists, wit11 sonit! of wlio~ii Prof. Conibcr Iiiicl t lie privilege of coliiliiirit1g notes (luring the siiinincr of 1930.
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