- 7 - 

 yoa sprayed 3 feet from the trunk on small trees. 



Below is a table showing the area in a 3-foot band from the trunk of trees 

 of various diameters. 



Approx. Number of Square Feet 

 Tree Trunk Diameter in Area 3' From Trunk 



2 inches 28 sq. ft.* 



6 inches 33 sq. ft. 



8 inches 34 sq. ft. 



1 foot 38 sq. ft. 



2 feet ^7 sq. ft. 



*The area covered by the trunk is subtracted. 



It can be noted that the actual area to be sprayed is much larger when trees 

 8 inches or more in diameter are sprayed. This would result in under-dosage if 

 the grower had applied the amount per tree as figured in the weed control table 

 given in the May issue of Fruit Notes . To eliminate this difference, the grower 

 could figure the number of trees to spray under with 100 gallons of spray by two 

 methods. 



1. Instead of figuring the distance from the trunk on trees with diameters of 



6 inches or more, calculate from the mid-point of the trunk diameter . Therefore, 

 on large trees the area sprayed would not extend 3 feet frcrni the trunk. 



2. Calculate the footage to be sprayed and the number of trees that can be 

 covered per 100 gallons; for example, 



(a) Tree trunk - 2 foot diameter 



(b) Want to spray 3 feet from trunk 



(c) The radius of the circle from the trunk mid-point is 4 feet 



(d) Area = w^r^ = 3.14 x 16 = 50.24 square feet. There are 43,560 square 

 feet in an acre. 43,560 -^ 50.24 = 867 trees to spray under with 100 gallons of 

 solution. If we subtracted the area covered by the tree trunk from 50.24 this 

 would change the area to 47.10 square feet. The number of trees to spray under 

 would be 925. The area taken up by the tree trunk is so small it can be ignored. 



---William J. Lord 

 I I I I I I I I I I I I I I I I 



WEED CONTROL IN SIIi^LL FRUIT PLAMTINGS 



Anyone who has ever grown any of the small fruits knows that weed control is 

 a very important part of the operation. Strawberries are so low growing that 

 without some control \jeeds often develop to the point where the grower finds it 

 impossible to keep ahead of them and yields are so low and picking so poor that 

 it becomes economically unsound to continue the bed. Many a bed has been abandoned 

 or plowed up because weeds took over. 



