INDEX 



435 



Sandy loams, 55 



soils, 54, 93 



soils are warm, 33 



soils, needs of, 389 



treatment of, 55, 123 



value of, 55 



Seaweed, as fertiliser, 386 

 Sedentary soils, 46 

 Seedlings, tree, 290 

 Seeds of quick-growing trees, to 



sow, 290 



Seeds, to germinate well, 99 

 Seepage, loss of water by, 84 



water, loss of plant food in, 85 

 Selling fertility, 311 

 Separating sand, silt, and clay, 73 

 Shallow soils, 30 



are dryest, 82 

 Share, plow, 133 

 Sheep manure, a good plant food, 



350 

 Silt, 52 



test for, 72 



to separate from clay and 



sand, 73 

 Single-crop farming, 310, 315 



is ruinous, 311 



Slope of land desirable, 34, 195 

 Soa land, to retain water in, 170 

 Soil, a chemical laboratory, 45 



acid, benefit of liming, 338 



alluvial, 17, 48 



analysis a guide to fertilising, 

 389 



bacteria, 334 



becoming rock, 5 



building, history of, 7 



built by wind, 18, 50 



chemical changes in the, 44 



cleansers, manures and fer- 

 tilisers, 319 



cold, drainage helps, 33 



contains air, 24 



elements in, 27 



evolution of, 7 



experts, figures by, 24 



fertilised by air, 37 



fertility, excretory theory of, 

 318, 321 



fertility, new theory of, 3 18-321 



fine, water capacity of, 81, 83 



fineness of, 23 



fineness is richness, 25 



formation, example of, 5 



Soil, germ life in the, 40 

 how plants make, 8 

 how water is held in, 29 

 influence of exposure, 34 

 influence of sun on, 34 

 inoculation, bacterial, 334 

 inoculation with bacteria, 40, 



43 



is a deodoriser, 39 

 keep it busy, 304 

 left by glaciers, 11 

 made by ice, 11 

 made by rocks, 3, 27 

 mineral contents of, 26 

 moved by water, 16 

 must be moist, SO 

 must be warm, 31 

 nature of, 22 

 particles, number of, 23 

 renovation, how to begin, 344 

 vt. subsoil, 69 

 survey, U. S., 74 

 temperature, 31 

 temperature, influence of til- 

 lage on, 36 

 teems with life, 20 

 tests, 72 

 to improve ventilation of the, 



37 



value as a mulch, 91 

 ventilation of, 37, 111 

 water, seepage of, 85 



can be prevented, 87 

 water, to maintain supply, 75 

 when ready to harrow, 151 

 yeast cake, action of, 335 



Soils, absorbent, 95 



absorb various gases, 38 

 activity of, 3, 20, 21 

 adaptability of, 24 

 adobe, 63 

 alluvial, 17, 48 

 analysing at home, 71 

 average depth of, 48 

 capacity to liold water, 80, 93 

 cause of infertility, 320 v 

 clayey, 56 



composition of, 3, 51 

 dark-coloured, 35 

 distribution of, 49 

 diversity of, 49 

 drift, 48 



exhausted of plant food. 284 

 farm, leading types of, 53 



