216 



Mechanical disintegration distinguished from chemical decomposition. 10, 80, 124, 



159, 163. 



fineness of soil particles requisite, 1, 3, 6, 13. 



Medium sand, application of the term, 190, 191, 194. 

 Methods of collection and analysis of samples, description of, 6, 13-17, 173, 175, 176, 



193-195. 



plant food extraction, 2, 13-17, 153. 

 Middelburg Division, 89, 183. 



efflorescence at, 183. 



Middle Bosjesveld, 115. 

 Mimosa, 57, 142. 

 Mineral theory, Liebig's, 1, 2. 

 Minimum, Law of, 11, 17, 95, 120, 153. 

 Minnesota Agricultural Experiment Station, 9. 

 Mississippi, Hilgard's work in, 11. 

 Mogogong, 142. 



Moisture, determination of, in soil, 7. 

 Molteno sandstones, 53. 

 Montagu, 115, 116, 118, 120. 

 Moorreesburg, 81. 

 Mosselbanks River, 78, 85. 



Mossel Bay Division, 4, 19, 20, 21, 90-94, 109, 113, 154. 

 Mount Currie District, 20, 21, 94, 112. 

 Mount Frere District, 20, 21, 95. 



Namaqualand Division, 20, 21, 95. 



Napier, 28, 30. 



Nauwpoort, 89. 



Newlands, 41, 42. 



'Nhlambe, 32, 64. 



Nieuwjaars River, 30. 



Nieuwveld, F.C., 28. 



Nile valley fertilised by river deposits, 109. 



Nitrification retarded by lack of lime and phosphates, 23. 



soil acidity, 23. 



Nitrogen, determination of, in soil, 7, 8. 



fixation of, by bacteria, 1, 23. 



proportion of, in Oudtshoorn soils, 98. 

 Nobbs, Dr. E. A., 20, 25, 26, 115, 141, 142, 183. 

 Nomenclature, variety of, in soil classification, 189-191. 

 North Middenveld, F.C., 63. 



Oaks, The, 33, 36. 



Oathay, Cape, poor in lime and phosphates, 3. 



Odendalstroom, 24. 



Oklahoma Experiment Station, 184. 



Olifants River (Oudtshoorn), 91, 96, 97, 109, 113, 139, 170. 



Olive shales, 141, 162, 171. 



Onder Duivenhoks River, 111, 114. 



Orange River, 24, 25, 108, 143, 171. 



clay, 108, 203. 



Organic matter, determination of, in soil, 7, 8. 

 Oudtshoorn calcareous loams, 98. 



Division, 4, 19, 21, 77, 91, 96-99, 113, 139, 161, 170. 



causes of fertility, 91, 96, 98, 109, 170. 

 Karroo, 77. 



Outeniqualand, 55, 57. 



Outeniqua Range, Difference in soil texture north and south of, 197. 

 Over Hex River, F. C., 147, 149, 152. 

 Owen, Dr. D. D., 11. 



Paardeberg, 79, 99, 102. 



Mountain, 36. 



Paarde Kop, 67. 

 Paarl Division, 19, 20, 21, 79, 86, 99-106, 157, 158, 164, 198. 



soils, mechanical analyses of, 198. 

 Palen and Rietvlei, F.C., 39. 



Permanent value and immediate productiveness, 10, 11. 

 Peters, Dr. R,, 11. 



