INDEX 



351 



Pyrites, 20, 220 



QUARTZ, 20 

 Quicklime, 118 



RADIATION of heat from, soil, 80 

 Radicicola bacillus, 146 

 Radishes, manure for, 199 

 Rain, amount of, 58, 68 

 composition of, 16 

 gauges, 67 

 Rape for green manure, 301 



,, cake as manure, 303 

 Raw bones, 241 

 Reactions, various, in soil, 132 

 Rectified guano, 297 

 Red clover, 169 

 Redonda phosphate, 212 

 Reduced phosphate, 219 

 Reduction in soils, 10, 131 

 Refuse cakes as manure, 204, 303 

 Restitution, 167 

 Restoration, 180, 181 

 Retention of plant food in soil, 



100, 105 



,, ,, water in soil, 60, 90 



Reverted phosphate, 219 

 Rocks, 24 

 Root crops, composition of, 169, 



194 



,, ,, manures for, 195 

 Roots, assimilative power, 124, 



194 



,, nodules on, 143 

 Rothamsted experiments 



,, crops, yield from un- 



man ured plots, 172 

 drainage, composition 



of, 98 

 nitrogen in, 102 



Rothamsted experiments manures, 

 continuous applica- 

 tion of, 266 

 manures, joint action 



of, 184 



rainfall, percolation 

 and evaporation, 

 68, 69 



,, rain water, com- 

 position of, 17 

 ,, soils, accumulation of, 

 nitrogen in, 14 

 ,, ,, inoculation of, 



149 



,, ,, volume weight 



of, 57 



SALE of produce, loss by, 171 

 Salt, common, 289 

 Sampling soils, 89 

 Sand, 31 



,, cultures, 7, 143 



,, stones, 33, 113 

 sandy soils, 42 

 saprophytic fungi, 138, 139 

 sawdust as litter, 314 

 Schlcesing on humic acid, 87, 110 

 ,, ,, retention of water, 



61 



Schone's method, 92 

 Schonite, 281 

 Sea-sand, 31 

 Seat of fixation, 146 

 Seaweed, 302 

 Sedimentary rocks, 28 

 Seeds, 7, 143, 170, 198 

 Sewage, 298 

 Seychelles guano, 296 

 Shales, 35 



Shallots, manure for, 199 

 Sheep's dung, 307 

 Shells, 112 



