294 



INDEX 



Sugar beets and farm man- 

 ures 155 



Sulphate of potash 181 



Sulphur compounds of soil . . 60 



Superphosphates 169 



Surface sub-soil, mixing of.. 251 



Tankage 123 



Taste of soils 42 



Temperature of soils 39 



Tests with fertilizers 208 



Thaer, work of 3 



Tobacco, manuring of 155 



Tobacco stems 184 



Transported soils 50 



Truck farming and fertiliz- 

 ers 226 



Turnips, fertilizers for.. 214, 224 



Ville ioi 



Volcanic soils 51 



Volume of soils 10 



Voorhees 204, 226 



Washing of land 255 



Water, action of, upon rocks 



and soils 46 



in rock decay 48 



bottom 23 



capillary 24 



capillary conservation 

 of 29-30-1 



Water holding capacity of 



soils 263 



hydroscopic 26 



losses by evaporation . 27 

 losses by transpiration 28 



of soil 23, 28 



of soil influenced 



by drainage .... 28 

 forest regions 29 

 manures .... 37 

 mulching ... 35 

 plowing .... 34 



rolling 33 



sub-soiling . . 33 

 required by crops .... 22 

 soluble matter of soils. 163 



Warington -US, 115. 116 



Weeds, cultivation to de- 

 stroy 251 



fertility in 194 



Weight of soils 9 



how determined 265 



Wheat, fertilizers for 213 



food requirements of. .219 



soils 20-1 



Whitney 15, 44 



Wilfarth 104 



Wind as agent in soil forma- 

 tion 51 



Wood ashes 182 



Wool waste 1 26, 1 94 



Zeolites 53, 160 



O' THE 



UNIVERSITY 



OF 



