EXERCISES 353 



Growers that practice this method are not troubled so much 

 with injurious insects and diseases as those who are forced 

 to produce the same crops on the same land year after year. 

 (See paragraph on cover crops in connection with fruits, 

 Chapter VI.) 



EXERCISES 



1. Name the three fertilizing elements that are contained 

 in manure and commercial fertilizers. 



2. What are the objections to the use of fresh stable manure 

 in market gardens? 



3. Name three fertilizers that are rich in nitrogen, three 

 rich in phosphorus, two rich in potassium. 



4. What soil condition makes necessary the addition of lime ? 



5. What is a cover crop? Is clover a good cover crop? 

 Why? 



HOME PROJECT 



In fertilizing the home garden use a moderate amount of 

 well-decomposed manure over the entire area. Supplement 

 this on one half the garden with a dressing of acid phosphate 

 applied at the rate of 300 pounds per acre. Keep date in 

 notebook to prove results. 



M. AND H. PLANT PROD. 23 



