CONTENTS. 



Department Bulletin No. 1059. — Research Methods in tee ivy or 



Forest Environment: p age . 



Introduction 2 



Measurement of environmental condition affecting forest vegetat'oii 11 



Climatic characteristics of locality 11 



Natural climatic regions 11 



Data obtained by Weather Bureau 11 



Knowledge of existing Weather Bureau stations necessary 12 



Computation of all weather data by periods of growth and rest . . 12 



Special observation of climate and soil of locality .• 13 



Location of instruments for the study of the growth of forest stands ... 13 

 Location of instruments for the study of condition affecting repro- 

 duction 13 



Air temperatures 15 



Soil temperatures 26 



Solar radiation — light 39 



Precipitation 60 



Soil moisture and soil qualities 66 



Atmospheric humidity 143 



Wind movement 146 



Evaporation 151 



Phenology .; 168 



External field observations 170 



Internal or physiological observations 171 



Field observation, photographs, and maps 172 



Appendix 175 



List of references 202 



Department Bulletin No. 1060. — Sitka Spruce — Its Uses, Growth, and 

 Management: 



Introduction 1 



Geographic distribution and altitudinal range : . 2 



Present supply and annual cut 4 



Characteristics of the wood 5 



Uses 6 



Logging and milling 8 



Size, age, and distinguishing characteristics 10 



Occurrence 12 



Bottom-land type 12 



Slope type 13 



Composition and A r olume of stand 13 



Climatic and soil requirements 15 



Light requirements 16 



Reproduction 16 



Cau«e< of injury 18 



Growth 23 



Yield 27 



Management 28 



Appendix 33 



Department Bulletin No. 1061. — Longleaf Pine: 



Range and importance 2 



Rate of growth 6 



Production of limber 13 



Prod ud ion of turpentine and rosin 22 



Cutting 34 



Reforestation 36 



Protection 44 



Timber and live stock 49 



uiTMi-AT Bulletin No. 1062. — Relation of the Character of the 

 Endosperm to the Buscbftibility of Dent Corn to Hoot Rotting: 



K:<r classification based on starchinesB 1 



Relation of endosperm character and ear infection 2 



Relation of kernel starchine j to pathological performance 



ceptibility of disease-free seed ears ' r * 



Summary 7 



