. Journal of the Department of Agriculture, Union of South Africa. osi)horic uxide in asample of doleiite from the Stormberg area. It would a])pear thatthe phosphoric oxide occurs as needles of apatite. ? The Geology of the C§pe Colony. ACKICCl/IMIlK AND SOILS rise to luther clayey soils coiitaiiuii^- railicr more,than average amounts of lime and magnesia, together with fairquantities of potash and phosphoric oxide. If not too chiyey the soilsare usually of high fertility, and, generally speaking, doleriteexercises a favourable infiuenre on the fertility ol the soils derivedfrom the sand
. Journal of the Department of Agriculture, Union of South Africa. osi)horic uxide in asample of doleiite from the Stormberg area. It would a])pear thatthe phosphoric oxide occurs as needles of apatite. ? The Geology of the C§pe Colony. ACKICCl/IMIlK AND SOILS rise to luther clayey soils coiitaiiuii^- railicr more,than average amounts of lime and magnesia, together with fairquantities of potash and phosphoric oxide. If not too chiyey the soilsare usually of high fertility, and, generally speaking, doleriteexercises a favourable infiuenre on the fertility ol the soils derivedfrom the sandstones, niuds;tones, and shales of the Stormhorg series ofrocks. This influence is to he seen on Iaardenverlies. The Soils : Desckiption, Physical and riiEMK ai. ComposiTioN, ANTi Geological Origin. In recording the data under this heading it has been thoughtadvisable to proceed according to the farm of origin, as being the moreinteresting to the general reader, rathei than according to phit, rv Tlie Hoiiif^tfad Iaanlriivcilic; /n(lrnrrilits-~Mr. I, (i. r. H///. This taini is the nearest of the series to Jiurghersdorj), and,nioieover, the lowest in altitude; its climate is iiieiefore not (juite sorigorous as that of the higliei-lying faims. Mealies can be grownand many kinds of fruit and \(^getables are grown with success andease. The homestead (vitJc Plate IV) is situated to the left oi the roadas one goes from Burghersdorp to Witkop Post Office, and lies undera characteristic kop which is built up of Molteno beds crowned with adolerite sheet. This mountain is an outlier of a (diain that runs north-westward towards Konimandants Kop. Black soils of reputed high fertility and suitability lor wheat-growing lie at the foot of this range; their fertility is doubtless dueto the effect of the dolerite sheet with which the range is (.-apped, andwhich seems to have weathered considerably. These soils were notsampled. On the opposite side of the road there is
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