CONTENTS 



XVll 



land, § 292 ; Place of farm manure in crop rotation, 

 §293. 



Questions on Chapter XVII . . . . . 



Laboratory Exercises ....... 



Study of farm manure, I ; Experiments with farm 

 manure, II ; The value of manure produced on the 

 home farm, III ; Reinforcement of farm manure, 

 IV; Building of a compost pile, V. 



232 

 233-234 



CHAPTER XVIII 



Green-Manures 235-240 



Protective action of green manures, 294; Mate- 

 rials supplied by green manures, § 295 ; Transfer of 

 plant-food materials, § 296 ; Crops used for green- 

 manuring, § 297 ; When green-manures may be used, 

 § 298 ; Handling green-manure crops, § 299 



Questions on Chapter XVIII . 

 Laboratory Exercises .... 



Study of green-manure in the field, 

 manure and the rotation, II. 



I ; Green- 



240 

 240-241 



CHAPTER XIX 



Crop Rotation, ........ 



Crop rotation and soil productiveness, § 300 ; 

 Root systems of different crops, § 301 ; Nutrients re- 

 moved from soil by different crops, § 202 ; Some 

 crops or crop treatments prepare nutriment for 

 other crops, § 303 ; Crops differ in effect on soil 

 structure, § 304 ; Certain crops check certain weeds, 

 § 305 ; Plant diseases and insects, § 306 ; Loss of 

 plant-food material between crops, § 307 ; Produc- 

 tion of toxic substances from plants, § 308 ; Manage- 

 ment of a crop rotation, § 309 



Questions on Chapter XIX .... 

 Laboratory Exercises ..... 



Crop rotations, I ; Fertilizing the rotation, 



242-247 



248 

 248 



II. 



