ational use are being planned in co-operation with the Chief of Parks Branch. Such 

 detailed use-capability studies are required at the resource management level. 



Closely integrated with the detailed site evaluation is the multiple-use land 

 classification required at the level of land-use planning. For this, a broad scheme 

 based on generalizations of the detailed classes has been developed for the five 

 types of resource development, dependent upon biological production. 



Owing to the complexity of factors which determine the adjustments to be 

 made in land use, the evaluation of the land classes must be considered in four 

 stages which increase in complexity with the increase in factors considered: 



Present production. 



Potential productivity of the land. 



Management practice in relation to potential and present condition. 



Economic and social factors. 

 During the present year, work was commenced on applying this system of 

 multiple land-use classifications to the landscape units of the 1 1 eastern counties 

 of Ontario. It is expected this will be completed this coming year. 



MEETINGS ATTENDED 



The unit was represented at the 1964 meeting of the Northeastern Forest Soils 

 Conference in Maine. A staff member is actively participating in this group's Site 

 Evaluation Committee. 



The leader of the unit was the official delegate of the Department at the 

 National Forest Land Inventory Technical Planning Meeting. At this meeting, the 

 forest land classification which has been developed in Ontario was accepted as the 

 basis for a national system being sponsored by Land Inventory Programme carried 

 on under A.R.D.A. 



Forest Tree Breeding 



Breeding projects continued with white pines, aspen poplars, hard pines and 

 spruces. The first controlled pollinations with black spruce, white spruce and sev- 

 eral exotic spruces were made in the spring of 1964. The purpose of these pollin- 

 ations was to determine the genetic variability of the native spruce species, the 

 genetic relationship of native and exotic species and the value of certain spruce 

 hybrids. 



WHITE PINE 



Resistance to blister rust and weevil, and satisfactory growth rate and 

 growth form continue to be the main objectives of this project. In 1964, com- 

 bining ability tests were continued, to determine which of the many selected rust- 

 resistant trees transmit resistance to their progeny. Results from these tests will 

 indicate which trees should be used for the mass production of rust-resistant seed 

 in seed orchards. Interspecific crossing between promising rust- and weevil-resistant 

 exotic and native white pine was continued. Several promising first and second 

 generation hybrids are presently being tested. 



ASPEN POPLARS 



The main aims of this project are the production of aspen-like hybrids, 

 suitable for growing in southern Ontario, having good growth rate and growth 

 form, good wood and ease of vegetative propagation. The problem of developing 



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