IXDEX. 317 



PAGE 



plant food, amount of, in -soil 30 



how absorbed 08-74 



plough draining 165 



European 112-119 



native 90, 93, 107, 110-112 



pad 75 



ploughing 90 



porosity of soil 38, 39, 50, 77 



potash. <S'tv? potassium. 



potassium as --plant food 27 



fixation of 34^*36 



in manure 222, 239, 241, 257, 261, 305-307 



in Nile mud 24, 227, 233 



i soil 24, 29-31, 231 



properties of soils, chemical 28-37 



physical 25, 35, 37 



puddling of soils 91 



pump*? 182-185, 190-192 



purslane 105 



putrefaction t',1 



quart/ 



rain, formation of .................... 15 



impurities in ................... 10 



in Egypt .................... '15, 193-194 



unseasonable ................... 17 



'' ramroum '' ...................... 107 



reclamation ...................... 186-210 



reduction ...................... 61 



regulator? ....................... 161 



reversion (in superphosphate) ............... 301 



rice ......................... 208 



ridging ........................ 94,- 119 



"rigla" ........................ 105 



rollers ........... -. . . ' ......... 125 



Rothamsted ............. ......... 10 



rotation of canals .................. . *. 152 



of crops ..................... 154 



root of plants ..................... 68-74 



-hairs ..................... 68-74 



.......... 173-176 



salt common, in boil ......... 23, 32/80, 89, 189, 200, 204, 206 



soluble, in soil ............... 32, 34. 57, lff3-16J 



