xii. CONTENTS 



, Furrow Bottom. — 131. Burning Stubble is Permanently- 

 Wasteful of Soil Fertility, but Often Immediately Profit- 

 lable. — 132. Surface Cultivation Sometimes Preferable to 

 Plowing.— 133. Early Fall Preferable to Date Fall Culti- 

 vation.— 134. Avoid Working Tight Clay Soils when too 



Wet 135. Harrow the Growing Crop only when there is 



Cause for so Doing.^ — 136. General Observations on Plow- 

 ing Stubble Land.— 137. The Importance of "Net" Re- 

 turns. 



CHAPTER X. 



The Summer Fallow 167 



138. The Function of the Fallow.— 139, The Practices 

 of Fallowing. — 140. Objections to Fallowing. — 141, De- 

 fence of Fallowing. — 142. General Conclusions. 



CHAPTER XI, 



Crop Rotations ' 182 



143. What a Crop Rotation is.— 144. The World's Best 

 Evidence on Rotations. — 145. Results of Tests at Saska- 

 toon and Brandon.— 146. Advantages of Suitable Crop 

 Rotations. — 147. Requirements of Rotations in Western 

 Canada. — 148. Difficulties in Establishing Good Rota- 

 tions in the West. — 149. Classes of Crops used in Ro- 

 tations. — 150. Planning a Rotation. — 151. Some Well 

 Known Rotations. — 152. Rotations now used in the West. 

 — 153. Rotation Tests at Brandon. — 154. I'ypical Grain 

 Farming Rotations. — 155. A Well Balanced Rotation. — 

 156. The Most Profitable Rotation at Brandon.— 157. 

 Rotations without Corn.^158. A Rotation for a Dairy or 

 Stock Farm. — 159. Observations on Rotation Tests at 

 Brandon. — 160. Mixed Farming Rotations at Lacombe. — 

 . 161, Criticisms of these Rotations. — 162. A Rotation 

 with many Advantages. — 163. Rotations with Sweet 

 Clover. — 164. An Adjustable Rotation — 165. Crop Ro- 

 tations for Special Conditions. — 166. The Effect of Rota- 

 tions on Soil Fertility. — 167. General Conclusions Re- 

 garding Rotations. 



CHAPTER XII. 



Weeds and Their Control ----- 211 



168. Why Weeds are Harmful.— 169. Some Good points 

 About Weeds. — 170. Principles of Weed Control. — 171. 

 Identification of Weeds and Weed Seeds. — ^172. Duration 

 of the Growth of Weeds.— 173. Habits of Root Growth 

 and Time of Seeding. — 174. How Weeds Spread. — 175. 

 How to Prevent Weeds from Developing Seeds. — 176. 



