FERTILIZING AND WATERING TREES 



1) 



The amounts of fertilizer source materials that will supply 

 the required 6 pounds of nitrogen per 1,000 square feet and can 

 be safely used in surface applications are (select one) : 



Material 



Urea 45-0-0 



Ammonium nitrate 33.5-0-0 



Ammonium sulfate 21-0-0 



Pounds Per 1,000 sq. ft. 



13 

 18 

 29 



^ CtP&*&9&s*^* 



Fig. 5. — The two types of spread- 

 ers that can be used to apply ferti- 

 lizer to lawns can also be used to 

 apply nitrogen fertilizers to the 

 soil around trees. 



