428 MANAGING ORCHARD SOILS AND FERTILIZING TREES. 



the side of the drawbar so that the ground near the trees may 

 be worked without running the tractor near them. It is more. 



(Caterpillar Tractor Co.y 

 Fig. 167. A disk at work in an Oregon pear orchard. 



important to work the soil close to young trees than older ones^ 

 in which the feeding roots are well out between the rows. 



