xvi CONTENTS 



PAGB 



Cultivating to kill weeds ...... 157 



Weeds steal plant food ...... 157 



Weeds steal water ....... 158 



The best time to kill weeds 159 



When weeds get a start . . . . . 160 



Weed collection . . . . . . .162 



The prevalence of weeds in sown crops . . .163 



Cultivation to save water . . . . . .163 



Sometimes needed when there are no weeds . . 164 



Signs of the need of cultivation . . . . .164 



How often to cultivate for making a mulch . . .165 

 How deep to cultivate . . . . . . .166 



The advantages of level culture ..... 168 



Preventing the loss of soil water from sod land . . . 170 



CHAPTER VIII. ROLLING, PLANKING AND HOEING 



Rolling to assist germination by supplying more moisture . 171 

 How accomplished . . . . . . .172 



When practicable . . . . . . .172 



Making a mulch after rolling ..... 173 



Other illustrations of the principle of rolling . .174 



Other benefits of rolling 175 



To crush lumps . . . . . . 175 



To warm the soil ....... 176 



Incidental benefits . . . . . . .176 



The kinds of rollers 177 



Planking 178 



The construction of a planker . . . . .178 

 When to use it and what it does . . . .178 



Hoeing 179 



Of less importance than formerly . . . .179 



Hoeing to make a mulch . . . . . . 180 



Hoeing to kill weeds . . . . 180 



Good and poor hoeing ...... 181 



Different styles of blades 182 



Miscellaneous hand tools ....... 183 



Their decreasing importance . . . . .183 



Hand cultivators . . . . . . .184 



Scuffle hoes . 184 



Selecting farm tools . . . . . . .185 



Too many tools means tied-up capital . - . 186 



A. variety necessary .-.-... . . 186 



