240 



Index 



Salt as manure, 164 



Sand, properties of, 20 



Sandy soils. 111 



Saxmundham experiments, 160, 



211 



Schultz, improvement of the Lupitz 



estate, 114 

 Seaweed, 197 

 Sewage sludge, 203 

 Shaw on autumn rainfall, 59 

 Sheep and soil fertility, 113, 118 

 Shoddy, 199 

 Short manure, 178 

 Shutt, loss of nitrogen from soil, 42 

 Silt, 22 



Silty clays, 23, 111 

 Slow acting manures, 166 

 Smith on drainage, 98 

 Snow, supposed fertilising action, 59 

 Snyder on loss of nitrogen from 



soil, 42 

 Sodium salts as manure, 163 

 Soil analysis, 227 ; belts and climatic 



zones, 52; effect of climate, 48; 



formation, 18 ; particles, sizes of, 



16 ; sampling, 227 ; type, 95, 105 

 Somerville, W., experiments on 



basic slag, 151 

 Soot as manure, 202 

 Sour soils, 51, 96, 219 

 Spraying weeds, 118 

 Spring cultivations, 83 

 Steam ploughing, cases of injury, 



34 

 Steamed bone flour, 141 

 Storage of dung, changes during, 



171 

 Straw as litter, 170 

 Subsoil, 34; improvement of, 91 

 Subsoiling, 90 



Sulphocyanides, toxic effect of, 155 

 Summer cultivations, 86 

 Superphosphate, 142 



Tchernozem (Kussian black earths), 

 40, 56 



Thin soils, 98 

 Tilth, 77, 96 

 Trenching, 90 

 Tundra, 55 



Turn-wrest plough, advantage of, 

 34 



Unexhausted values of manure, 186 

 Unit values, 206 



Urine, most valuable part of 

 manure, 168 



Voelcker, J. A., and Hall's tables 

 for manurial values, 188; green 

 manuring experiment, 114; acid 

 soil at Woburn, 135; loss ia 

 making manure, 170; reports on 

 manures, 20s 



Wagner, Paul, experiments on 



basic slag, 149 

 Waste land, 69 

 Water supply and plant growth, 6; 



content of soil, 32; as affected 



by manuring, 181 

 Wax in soil, 37 

 Weather: effect of, on soil, 57 

 Weeds, effect of, 87 

 Wheat land map, 67 

 Wheat, record crop, 106 

 Wheeler on acid soils, 135 

 W^inter cultivations, 78; dry, good 



effect of, 57 ; wet, bad effect of, 



58 

 Woburn experiments. See Voelcker,. 



J. A. 

 Wood ashes as source of potash, 



157 

 Wood, T. B., and Stratton, errors 



of held trials, 139 ; loss in making 



farmyard manure, 170 

 Wool scourings as source of potash, 



156 

 Wool waste as manure, 199 

 Wrightson, John, experiments witlx 



basic slag, 149 



