436 



INDEX 



Soils, farm, mostly incomplete, 4 



native plant food in, 



419 

 test of water capacity, 



93 



glacial, 49 



now to manage, 46, 123 

 kinds of, 46-50 

 light-coloured, to make dark, 

 35 



treatment of, 35 

 loess, 62 



native richness of, 281 

 peat and muck, 60 

 salt marsh, 64 

 sandy, 54, 123 

 sedentary, 46 

 shallow, 30 

 sour and wet, unfavourable 



to bacteria, 337, 401 

 test of water-moving ability, 



95 



tests for, 72 

 that need liming, 400 

 transported, 47 

 unproductive because mis- 

 managed, 344 

 value of, 50 

 value of testing, 73 

 water capacity of, how to 



increase, 83 



why they are sour, 400 

 worn-out, and green-manur- 

 ing, 322 



Soja bean a good soil improver, 341 

 Sour soils, crops for, 401 



how to sweeten, 401 

 tests for, 401 

 what to plant in, 401 

 why so, 400 



South Carolina, rotation in, 414 

 South Dakota, rotation in, 415 

 Soy bean a good soil improver, 341 

 Spade, ditching, 225 

 Sphagnum moss, 47 

 Spring plowing, 135 

 Stock-feeding and soil fertility, 345 

 Stones as plant food, 25 



heaved up, 5 

 Stony loams, 59 



Streams underground, 85, 243 

 Stubble, fertilising value of, 352 

 Sub-irrigation, 260 

 cost of, 260 



Sub-Irrigation, of soils, 260 



pipes for, 261 



tiles for, 261 



Subsoil, influence on water capacity 

 of soils, 82 



what it is, 69 

 Subsoiling, 124, 125 

 Succession cropping, profits of, 311 

 Sulky plow, 138 

 Sulphate of ammonia, 378 



nitrogen contents of, 378 



of potash, 386 



high grade, cost of, 386 

 low grade, cost of, 386 

 Sun, influence of, on soil, 34 



like a pump, 89 

 Superphosphate, enriches manure, 



357 



Swivel plow, 137 

 Sylvinit, a crude potash salt, 385 



Tags, fertiliser, guarantees on, 368 



repetitions in, 369 



studying, 368 



Temperature changes, results of, 5 

 Temperature of different soils, 32 



of the soil, 31 



for barley, 32 

 for clover, 32 

 for pumpkins, 32 

 for tomatoes, 32 

 Tennessee, rotation in, 415 

 Tests for soils, 72 

 Texas, rotation in, 415 

 Texture, soil, manure improves, 347 

 Tile drains, cost of laying, 228 



kinds of tiles for, 221 



need close joints, 226 



obstructions in, 227 



size of tiles for, 217 



to fix grade, 212, 214 



to lay, 206, 216, 221, 225 



round are best, 221 



use of, 205 

 Tiles, 3-inch best for drains, 217 



cost of, 229 



drainage capacity of sizes, 223 



glazed, 222 



how to lay, 225, 261 



how to select, 222 



kinds of, 221 



relative capacity of sizes, 223 



round, most in use, 221 



special forms of, 221 



