170 



may, therefore, be expected in the soils to which these rocks give rise, and 

 in the following table this anticipation will be seen to prove correct : 



XIV. UlTENHAGE SERIES. 



Phosphoric- 

 Division. Farm. Fine earth. Water. Linie. Potash, oxide. 



Knysna. Ganze Vallei. 99'5 219 116 '054 '045 



Witte Drift. 90'8 T60 112 '069 '044 



Matjesfontein. 84'4 T33 112 "039 '078 



Oudtshoorn. Vlakte Plaats. 89'5 2'06 1170 '299 



Eiet Vallei. 56'0 '65 154 100 '074 



Oudtshoorn. 69'9 3'73 100 149 "058 



Blauwboschkuil. 91/5 1/97 "530 '211 134 



Welbedacht. 91'0 '87 '606 144 124 



Jan Fourie's Kraal. 95'9 "84 172 161 '063 



Welgerust. 911 3/57 170 170 '063 



Adjoining Buffels Vlei. 81'9 '44 "046 '098 '049- 



Uitenhage. Upper Landdrost. S9'5 2'70 182 "292 '073 



98-9 '79 156 197 '068 



Gouvernements Be- 991 1/92 '718 '333 143 

 looning. 



98-3 1-07 -078 108 "075 



Klaas Kraal. 93'2 '94 '392 '239 116 



100- 1-35 "592 -226 "086 



98-4 '90 '066 178 '063 



99-6 1'02 182 185 '092 



Malmaison. 95'8 T22 "278 "276 "087 



99-2 118 '338 '278 132 



It is interesting to note how closely these Uitenhage soils resemble- 

 those of the preceding table in respect of their plant food content. In 

 each case the average is slightly higher than in the Burghersdorp and 

 Stormberg soils, namely : 



Lime '299 



Potash 181 



Phosphoric oxide '087 



Of soils representative directly and solely of recent superficial deposits- 

 not many analyses have been made. Two samples, one of which is a type 

 of the blown sands that cover the Cape Flats, yielded the results given 

 below : 



XV. SAND DOWNS. 



Phosphoric 

 Division Farm. Fine earth. Water. Lime Potash, oxide. 



Knysna. Sidgefield. 96'4 '56 "090 '050 '051 



Stellenbosch. Eerste Rivier. 981 '066 '010 '003 



Both of these, it will be seen, are very poor in plant food generally. 



Of quite a different type are the silts transported, some of them over 

 distances of hundreds of miles, by streams and rivers. The composition 

 of our river silts is far too vast a subject to discuss at this stage, but 

 it is one that calls for much close study and patient investigation. Silts 

 are proverbially fertile, a circumstance which is due, not only to their 

 chemical composition, but to their mechanical condition as well. To this 

 fact the Oudtshoorn Division, whose soils are so largely made up of the 

 silts and clays brought down from the Karroo by the Gamka and Olifants 

 Rivers, owes its productiveness. Amongst all the soils that have been 

 analysed in the Government Laboratories, none occupy a higher place than 

 those of the Oudtshoorn Division, and much of the rich soil of that area 



