Eradication of Mustard. 155 



junction with fall cultivation of stubble 

 fields. 



6. The bare falloiv which is maintained 

 throughout the season, though effective, is 

 an expensive method of fighting weeds of 

 this class, both in the labor required to 

 maintain it, and the soil fertility which is 

 lost through leaching, especially where the 

 rainfall is considerable. A modification 

 of the bare fallow which is maintained 

 throughout the year can be made by com- 

 bining the fall cultivation advised in sec- 

 tion 3 with disking and harrowing in 

 the spring for a few weeks, followed by 

 late planting of a cultivated crop or a rank- 

 growing soiling or green manure crop. 

 This is a good method of fighting weeds 

 of all kinds, and is less expensive than fal- 

 lowing through the entire season, while it 

 does not require the land to lie idle 

 throughout the year and thus lose a crop. 



/. Hand pulling is practicable only when 

 mustard and similar weeds occur in small 

 numbers when first introduced, or when 

 they have been greatly reduced by other 

 methods. Hand pulling is more efifective 

 than spudding, as the weeds can then be 

 carried from the field and burned or other- 



