xu 



CONTENTS 



Resenini: (groups of seed-trees 

 Reser\ insx thrifty standards 

 Clear-cuttintj in two or more operations 

 Alternate cleared strips . 

 Irregular cleared strips . 

 Profiressixe cleared strips 

 Use in this country 

 Clear-cuttino; in patclies 



116 

 ]]8 

 121 

 12J 

 ]28 

 1.^2 

 ].U 

 ]35 



Chapter ]\ . — The Shelterwood System 



L nderlyim^ principles (jf the slielterwuod s\steni 



Adxantages of the system 



Disad\antaties of tile system . 



\'ariation m application 

 Primitne application of the system 

 Application in the lonii;leaf pine forests 



J he first or seed-cuttini,' 



The second cuttinij; 



Results .... 



^Application in the Black Hills 



The first cutting 



The second cuttmij; 

 Progress in the de\elopment of the shelterwood 

 system ....... 



Intensive applicati(m of the shelterwood system 

 Shelterwood system with uniform cuttings 

 1 he preparatory cuttings 



The seed-cutting . 



J he removal cuttings 

 Shelterwood cuttings in strips 

 Shelterwood cuttings in groups 

 1 he two-storied s\sttni 



i.W 



],v 

 ].-i7 

 ]40 

 J4II 

 ]4] 

 ]42 



144 

 ]45 

 ]4() 

 J47 

 ]4'i 

 J5II 



15(1 

 .152 

 15.-1 

 15.? 

 ]5o 

 lol 

 1()2 

 104 



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