214 



Herbert Division, 21, 62, 155, 176,. 

 Herbert's Dale, 91. 

 Heuveltjes : see " Hillock soils." 

 Hex River Range, 148. 

 Valley, 147. 



Highlands, Albany Division, 23. 

 Hilgard, Prof. E. W. 5, 11, 12, 17, 18, 87, 99, 153, 174, 179, 189, 191. 



soil classification of, 189, 191. 



,, soil extraction, method of, 16, 21, 153. 



Hillock soils, 85, 86, 87, 101, 102, 103, 105. 



more fertile than lower levels, 85, 86, 102, 103. 

 withstand rust, 102. 



Hope, The, F.C., 31. 

 Hopetown Division, 20, 21, 63, 162. 

 Hottentot's Holland, 124. 

 Huis River, 74. 



Humansdorp Division, 4, 20, 21, 57, 63, 137, 154, 167. 

 Humic acid as a plant food solvent in the soil, 5. 

 Humus theory, Thaer's, 1. 



Hydrochloric acid as a plant food solvent, 2, 9, 10, 12, 13. 

 ., boiling, soil extraction by, 126, 155. 



methods of soil extraction by, 13-16. 



Tbeka, 64. 



Idutywa beds, 32. 



Idutywa District, 19, 21, 64. 



Ignited soil, extraction of, by Hydrochloric acid, 15. 



Immediately available plant food, 9, 10, 11, 156, 172. 



Immediate productiveness and permanent value, 10, 11. 



Ingle, H., 189. 



Inorganic plant food, estimation of, 8. 



Insects as fertilising agents, 87. 



Irrigation, 108, 109, 113, 115, 117, 126, 127, 136, 142, 143, 172. 



effect of, on alkaline soils, 172, 179, 180, 186. 

 works should be preceded by soil analyses of certain kinds. 172. 



Kaffir Kuils River, 111, 113, 114. 

 Kahl's soil sieves, 7. 

 Kalahari, 108, 203. 



sands, 203. 

 Kalkbank, 77. 

 Kambu Forest, 137. 

 Kamnassie, 57. 

 Kaolin, 42. 



Karnemelk River, 129. 

 Karroo bushes : (see also Ganna), 97. 



system, 32, 121, 154, 168, 169, 171. 

 soil transported from, 109, 113, 170. 

 ''Karroo" soil, 92, 93, 96, 112, 113, 114, 116, 117, 118, 126, 132, 139, 140, 142, 



149, 150. 



Keisie, The, 116, 117. 

 Keizers River valley, 116. 

 Kenhardt Division, 20, 21, 65. 

 Kentani beds, 32. 

 Kentucky soil survey, 11. 

 Keurbooms River, 67, 69, 171. 

 Kimberley Division, 20, 21, 65, 171. 

 King William's Town Division, 20, 21, 67, 167. 

 Klapmuts, 122, 124. 

 Klein Drakenstein, 104. 

 Klein Steenboks River, 33, 35. 

 Klein Zwart River, 34. 

 Klip and Doom Rivers, F.C., 55. 

 " Klippers grond," 36, 103. 

 Klip River, 129. 

 Kluitjes Kraal, 129. 



Knysna Division, 4, 19, 20, 21, 67, 139, 155, 164, 170, 171, 197. 

 Koeberg, 39, 40, 41, 45. 

 Kokstad, 94. 



