{Md. Exp. Sta.) 



Fig. 162. Different soil management systems, (a) Clean cultivation followed with 

 cow peas as a cover crop, (b) Permanent sod of alfalfa which has just been cut. 

 The strip in the tree row will be cut next and then the trees will be heavily mulch- 

 ed with the cut material, (c) Sweet clover sod mulch. Note the thick mulch of 

 clover piled around the tree, (d) Clean cultivation in a young apple orchid, A 

 cover crop will be sown in late July, (e) A good cover crop of rye starting in a 

 young peach orchid. It was sown early in the season — ^August 1. (f) Sweet clover 

 as a permanent sod mulch. Note the large amount of organic matter and mulch- 

 ing material produced by this crop. 



