LESSON XLIV 



WEEDS AND PLANT DISEASES 



Weeds are plants that grow where they are not 

 wanted. The farmer tills the soil, plants the seed, and 



adds fertilizers for the use- 

 ful crop he expects to 

 grow. Then the unwel- 

 come weeds come to rob 

 the soil of the needed 

 moisture and fertility. 

 The farmer tries to de- 

 stroy them by soil tillage, 

 but year after year weeds 

 still infest the fields. 



Value of weeds. Some 

 people consider weeds use- 

 ful because they make it 

 necessary for the farmer 

 to cultivate his crops in 

 order to kill the weeds. 

 Sometimes, however, the 

 stirring of the soil for the necessary destruction of 

 weeds has to be done at a time when it is not best for 



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SMUT ON CORN 



