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FERTILITY AND FERTILIZER HINTS 



tinually. A rotation of crops often eliminates such troubles be- 

 cause certain insects and plant diseases are only common to one 

 particular crop. A good illustration of this is noticeable in the 

 growing of cotton. There is an insect called the cotton boll 

 weevil, which punctures cotton bolls and destroys the crop. 

 Fields that once produced valuable crops of cotton must now 

 be planted to other crops which are not injured by this insect. 

 5. Rotation Furnishes Feed for Live-stock. — One crop farmers 

 are often forced to buy feed for their live-stock. A farmer who 

 uses a rotation of crops can plan his rotation so that most of 

 the feed will always be produced on the farm. In one crop 



Fig. 3 — Oats fit well in rotations and furnish feed for live-stock. 



farming the sale of the crop brings only one value. When 

 several crops are grown it is possible to produce feed for live- 

 stock and a double value is received for the crop. This double 

 value is represented in the feeding value and fertilizing 

 value; the crop is fed and the manure spread on the land. 



6. A Regular Income. — Farmers who raise single crops receive 

 their money but once a year and many of these farmers use 



