INDEX 



653 



Soils of eastern states, 72, 75, 138 



Europe, 63, 634 



India, 66 



Northern states, 97, 138 



Rothamsted, 63, 411, 416 



Russia, 66 



South America, 67 



southern states, 92, 138 



Transvaal, 67 



Turkey, 67 



western states, 101, 138 

 Solution law, 366 

 South American soil, 67 

 South Carolina, phosphates, 187, 595 



record yield of corn per acre, 619 

 Southern states soils, 92, 138 

 Spencer, on farming in semiarid region, 



58i 



Spillman, on Kansas crop yields, 330 

 Spreader for limestone and phosphate, 1 79 

 Starches, 31 



Statistics of agricultural products, 605 

 Steatite, 48 

 Sterile soils, 63, 367 



Stimulants, 368, 394, 402, 479, 508, 533 

 Straw, composition, 157, 603 

 Structure of soils, 116 

 Success in farming, 584 

 Sugar beets, 155, 399, 604 

 Sugar statistics, 620 

 Sugars, 31 



Sulfates and sulfids, 52 

 Sulfur 39, 106, 158 



in rain, 106 

 Superphosphate, 191 

 Supply and demand of plant food, 59 

 Swamp soils, 80, 583 



Sweet clover, content of nitrogen and or- 

 ganic matter, 220 

 Symbol, defined, 7 

 Systems of permanent agriculture, 159 



Temperature factor in crop production, 



576 

 Tennessee, phosphates, 187, 188, 595 



soils, 64, 93, 138, 367 

 Terminations in chemical names, 19 

 Terrace soils, 124 

 Testing soils, 565, 626 

 Texas soils, 95, 138 

 Texture of soils, 116 

 Thaer's soil-fertility theories, 302 

 Theories concerning soil fertility, 300, 362, 



366, 385 



Timber soils, 79, 133 

 Tobacco, composition, 604 



experiments, 288 



statistics, 605 



Transmutation of elements, u 

 Transported soils, 54 

 Transvaal soils, 67 



Tubercles on roots of legumes, 212, 215 

 Tubers, composition, 604 

 Tull's soil-fertility theories, 300 

 Turkish soil, 67 

 Turnips, composition, 417, 604 

 experiments, 346, 399 



Utah, phosphates, 596 

 soils, 101 



Valence, defined, 4 



Value of land, 586 



Van Helmont's soil-fertility theories, 300 



Van Hise, on phosphates, 560 



Vegetable fats and oils, 34 



Vegetables, composition, 604 



Vesuvius lava, composition, 67 



Virginia, field results with raw phosphate. 



289 



soil, 138 



Vital processes in plant growth, 33 

 Volcanic ash, 67, 138 



Wales soil, 642 



Washington soils, 102 



Water (see moisture) 



Water-soluble plant food, 141, 513 



Weathering of rocks and soils, 49, 61, 174 



Webster's view of agriculture, 594 



Western states soils, 101, 138 



Wheat, composition, 75, 154, 417, 603 



Wheat bran, composition, 41, 604 



Wheat grown every year: 



Canada, 505 



Jethro Tull, 306 



Minnesota, 499 



Rothamsted, 363 



Whitney, on potatoes at Rothamsted, 389 

 Whitney and Cameron's soil-fertility theo- 

 ries, 313, 362, 367, 385 

 Whitson, on loss of phosphorus from Wis- 

 consin soils, 560 



Widtsoe, on arid soils and vegetation, 101 

 Williams, on value of manure in China, 338 

 Wilson, on abandoned lands, 342 

 Wing, on use of limestone and raw phos- 

 phate, 289 

 Wisconsin experiments, 216, 221, 289, 560 



soils, 99, 138 

 Wood ashes, 531, 602 

 Wyoming phosphates, 595 



soils, 102 



Zein, 39 

 Zeolites, 50 



