WEED KILLING. 119 



senic. Add to this twenty gallons of water and it is 

 ready for use. But this has to be used circumspectly. If 

 the poison is carried to the roots of other plants or trees 

 by rain flow or irrigation, it will kill them also. 



Eeally the best treatment of weeds is to destroy them 

 as soon as they appear by pulling, hoeing, or cultivating, 

 or by digging or plowing them into the soil when they 

 make taller growth, thus adding humus to the soil as a 

 product of their decay, as is discussed in the chapter on 

 garden fertilization. 



