vi 



PART III. RESULTS or CHEMICAL ANALYSES (contd.) 



PAGE. 



Hanover . . . . . . . . . . . . . . . . . . . . 61 



Herbert 62 



Hopetown . . . . . . . . . . . . . . . . . . . . 63 



Humansdorp . . . . . . . . . . : . . . . . . . 63 



Idutywa . . . . . . . . . . . . . . . . . . . . 64 



Kenhardt 65 



Kiinberley . . . . . . . . . . . . . . . . . . . . 65 



King William's Town . . . . . . . . . . . . . . . . 67 



Knysna 67 



Komgha 



Ladismith . . . . . . . . . . . . . . . . . . . . 74 



Maclear 77 



Mafeking . . . . . . . . . . . . . . . . . . . . 77 



Malmesbury . . . . . . . . . . . . . . . . . . 78 



Middelburg 89 



Mossel Bay 90 



Mount Currie 94 



Mount Frere . . . . . . . . . . . . 95 



Namaqualand . . . . . . . . . . . . . . . . . . 96 



Oudtshoorn . . . . 96 



Paarl 99 



Piquetberg 107 



Port St. John's 107 



Prieska 108 



Queenstown . . . . . . . . . . . . . . . . . . 109 



Richmond .. .. .. .. .. .. .. .. .. .. 110 



Riversdale Ill 



Robertson .. .. .. .. .. .. .. .. .. .. 115 



St. Mark's 121 



Somerset East 121 



Stellenbosch 122 



Steynsburg . . . . . . . . . . . . . . . . . . . . 126 



Stockenstrom 128 



Swellendam 129 



Tulbagh 134 



Uitenhage . . . . . . . . . . . . . . . . . . . . 136 



Umtata 137 



Umzimkulu . . . . . . . . . . . . . . . . . . 137 



Uniondale 138 



Victoria East 141 



Vryburg 141 



Willowmore .. .. .. .. .. .. .. .. .. 145 



Willowvale 145 



Wodehouse 146 



Worcester ..147 



PART IV. COMPARISON OF SOIL EXTRACTION METHODS 153 



PART V. GEOLOGICAL RELATIONS AND PLANT FOOD . . . J . . . 157 



Aid derived from geological survey . . . . . . . . . . . . 157 



Selection of geologically-typical samples . . . . . . . . . . 157 



Malmesbury series soils . . . . . . . . . . . . . . . . 157 



Effect of sandstone on Malmesbury soils . . . . . . . . . . 159 



Granitic soils . . . . . . . . . , . . . . . . . . 159 



Cango beds soils . . . . . . . . . . . . . . . . . . 161 



Campbell Rand soils . . . . . . . . . . . . . . . . 161 



Soils derived from Stow's " olive shales " . . . . . . . . . . 162 



Soils of the Pniel volcanic series . . . . . . . . . . . . 163 



Table Mountain sandstone soils . . . . . . . . . . . . 163 



Bokkeveld soils 164 



Soils of the Table Mountain-Bokkeveld junction 165 



Witteberg soils 167 



Dwyka Soils 168 



Soils of the Burghersdorp beds and Stormberg series 168 



Uitenhage series soils . . . . . . . . . . . . . . . . 169 



Soils of the sand downs . . . . . . . . . . . . . . 170 



Alluvial Silts and River deposits 170 



