TABLE OF CONTENTS XV 



PAGE 



260. Average Age, Definition and Determination 337 



261. Determining the Volume and Diameter of Average Trees 338 



262. Determining the Age of Average Trees and of the Stand 339 



263. Age as Affected by Suppression. Economic Age 341 



CHAPTER XXIV 

 GROWTH OF TREES IN DIAMETER 



264. Purposes of Studying Diameter Growth 342 



265. The Basis for Determining Diameter Growth of Trees 342 



266. The Measurement of Diameter Growth on Sections 342 



267. The Determination of Average Diameter Growth from the Original Data . 346 



268. Correction of Basis of Diameter Growth on Stump to Conform to Total 



Age of Tree , 348 



269. Correlation of Stump Growth with D.B.H. of Tree 348 



270. Factors Influencing the Diameter Growth of Trees Growing in Stands .... 351 



271. Effect of Species on Diameter Growth V . . 351 



272. Effect of Quality of Site , . 352 



273. Effect of Density of Stand 352 



274. Effect of Crown Class 353 



275. Laws of Diameter Growth in Even-aged Stands, Based on Age 354 



276. Laws of Diameter Growth in Many-aged Stands, Based on Diameter 357 



277. Current Periodic Growth Based on Diameter Classes. The Increment 



Borer 358 



278. Method Based on Comparison of Growth for Diameter Classes 360 



279. Method Based on Projection of Growth by Diameter Classes 361 



280. Increased Growth, Method of Determination 363 



CHAPTER XXV 

 GROWTH OF TREES IN HEIGHT 



281. Purpose of Study of Height Growth 365 



282. Influences Affecting Height Growth 365 



283. Relations of Height Growth and Diameter Growth 367 



284. Measurement of Height Growth 368 



285. The Substitution of Curves of Average Height Based on Diameter for 



Actual Measurement of Height Growth 371 



CHAPTER XXVI 

 GROWTH OF TREES IN VOLUME 



286. Relation between Volume Growth, Form and Diameter Growth 374 



287. Tree Analysis, its Purpose and Application 374 



288. Substitution of Volume Tables for Tree Analyses 375 



289. Measurements Required for Tree Analyses 376 



290. Computation of Volume Growth for Single Trees 377 



291. Method of Substituting Average Growth in Form, or Tapers for Volume.. 379 



292. Substitution of Taper Tables for Tree Analyses 382 



