256 



INDEX 



Potatoes, Seed, 227. 

 Precipitated phosphate, 137. 

 Prepotency, 236. 

 Properties of soil, 24. 

 Purity of seed, 220. 



Rape meal, 125. 

 " Real Value " of seed, 222. 

 Recessive characters, 242. 

 Reversion, 234. 

 Reverted phosphate, 167. 

 Roots as weathering agents, 22. 

 Rotations, 188. 

 Rotations, Types of, 200. 



Sandy soil, Properties of, 48. 



Seed, 219. 



Seed, Change of, 223. 



Seed potatoes, 227. 



Seeding, Density of, 248. 



Selection of plants, 236. 



Sickness of clover, 133, 193, 200. 



Slag, Valuation of basic, 138. 



Soil, capacity to hold water, 27. 



Soil, Capillary power of, 28. 



Soil, Properties of calcareous, 

 58. 



Soil, Properties of clay, 55. 



Soil, Cohesiveness of, 24. 



Soil-cover of seed, 245. 



Soil, Formation of, 9. 



Soil, Properties of humus, 60. 



Soil, Properties of, 24. 



Soil, Properties of sandy, 48. 



Soil, Types of, 47. 



Specific heat, 39. 



" Sports," 234. 



Stassfurt mines, 147. 



Sulphate of ammonia and 

 nitrate of soda compared, 111. 



Sulphate of ammonia removes 

 lime, 59, 116. 



Sulphate of ammonia, Valua- 

 tion of , 119. 



Sulphate of potash, 149. 



Superphosphate, Valuation of 



142. 

 Superphosphate and basic slag 



126. 

 Surface attraction of soil, 29. ^ 



Three-field rotations, 202. 

 Turnip seed, Raising, 214, 224. 

 Types of soil, 47. 



Unit valuations, 120, 145, 149. 



Valuation of basic slag, 139. 

 Valuation of bone manures, 145. , 

 Valuation of farmyard manure, 



175, 180. 

 Valuation of nitrate of soda, ! 



118, 120. 



Valuation of phosphatic man- 

 ures, 137. 

 Valuation of potash manures, 



149. 



Valuation of seed, 223. 

 Valuation of sulphate of 



ammonia, 119. 

 Valuation of superphosphate, 



142. 



Variation of plants, 234. 

 Variations of temperature as a 



weathering agent, 13. 



Warping, 90. 



Water as a carrier of plant 

 food, 34. 



Water condensed from atmo- 

 sphere, 37. 



Water depresses temperature, 

 39, 76. 



Water-holding power of soil, 27. 



Water as a weathering agent, 14. 



Weathering agents, 13. 



Wheat breeding, 241. 



Wheat rust, 230. 



White clover, Effects of phos- 

 phates on, 129. 



Worms, Action of, 7 1. 



