and decisions. These would include the salvage of operable diseased white pine 

 timber before complete loss; infection controls, such as in Ribes eradication 

 programs; production of rust-free nursery stock; and selection of planting sites 

 A'ith a minimum hazard for rust infection. 



In 1962, examinations (or in some cases re-examination) were made in the 

 Little Nipissing River area in the Pembroke District, Simcoe County in the Lake 

 Simcoe District, North and South Dumfries Townships in the Lake Huron District, 

 the Nipigon valley of the Port Arthur District, and several areas in the Fort Frances 

 District. 



Surveys and investigations in recent years within the commercial range of 

 white pine in northern Ontario have indicated that in some areas the disease is 

 severe and increasing. 



Miscellaneous Note. Mr. J, Holowacz, a forester in the Research Branch, 

 returned from educational leave after successfully completing a Master's degree 

 course in Forest Economics. 



STATISTICS AND MENSURATION 



This section is maintained primarily to carry out a policy of proper initial 

 design of experiments and of correct analysis of the resulting data. Details of the 

 experimental work are reported by the sections carrying out the field work. 



The variety of experimental data to be analyzed covers a wide range including 

 mortality and growth of planted trees to test the effect of different methods of 

 treatment such as variation in baling and storage methods, root pruning, fertili- 

 zation, thinning, etc; standards for culling and grading nursery stock; methods of 

 securing accurate inventories of numbers of trees in nurseries; variation in soil 

 flora following prescribed burning; inherited characteristics of different strains of 

 tree species with particular reference to resistance to insect and fungus attack, and 

 to requirements for optimum seed germination; effects of herbicides; statistics of 

 age and weight of deer; animal censuses. 



In addition, work in forest mensuration is carried out since it requires use of 

 similar techniques. 



Determination of Volume of Wood Cut 



Objective : To investigate possible alternative methods to the present method 

 of complete scaling of timber cut on crown lands. 



Three experimental cruises of standing timber that were later cut and scaled 

 have been carried out. The check of the cruised volume with scale was, in two 

 cases, satisfactory. Final scale figures in the third case are not yet available. The 

 question of the scaling in some cases of only a sample of the wood cut and also of 

 substituting weighing for scaling diameters are being considered. 



Growth of White Pine 



Objective: To obtain knowledge of the growth of white pine and a basis 

 for estimating future yields of young pine. Also, to test a proposed index diameter 

 method of estimating yield. 



The field work has been completed and working up of the data is in progress. 



Permanent Sample Plots 

 Objective : To obtain knowledge of tree growth and of the effect of thinnings, 

 release cuttings, etc, by a periodic remeasurement of plots. 



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