Keyword: site productivity

• Interim validation of the western hemlock growth intercept model.
  http://www.for.gov.bc.ca/hre/pubs/pubs/0092.htm
  Growth intercept models estimate site index (a measure of site productivity) from average tree height growth measured immediately above breast height. These models have been developed for four species: coastal western hemlock (Tsuga heterophylla (Raf.) Sarg.) (Nigh 1996a) and Sitka spruce (Picea sitchensis (Bong.) Carr.) (Nigh 1996b); interior lodgepole pine (Pinus contorta Dougl.) (Nigh 1995a) and spruce (P. glauca (Moench) Voss, P. engelmannii Parry, and P. glauca x engelmannii) (Nigh 1995b). Growth intercept models are expected to be developed for all commercial species in British Columbia. It is important that these models be validated (tested). Growth intercept models are empirical; hence they strongly reflect the behaviour of the model development data. Therefore, testing them with independent data (that is, data that were not used to develop the model) is important because the model development data may be atypical (Picard and Cook 1984). If a model vali ...

• Impacts of blading and burning site preparation on soil properties and site productivity in the sub-boreal spruce zone of central British Columbia.
  http://www.for.gov.bc.ca/hre/pubs/pubs/0401.htm
  Impacts of blading and burning site preparation on soil properties and site productivity in the sub-boreal spruce zone of central British Columbia. ...

• Forest productivity and soil conditions on rehabilitated landings: Interior B.C. Sept 1999.
  http://www.for.gov.bc.ca/hre/pubs/pubs/0984.htm
  l. 1999b; Venner 1999). Despite significant progress in the past, and new information expected in the future, there is a need for information to guide operational projects that are currently under way. In particular, information is needed on the long-term effectiveness of soil rehabilitation efforts, and the extent to which operational soil rehabilitation can contribute to the timber supply. We examined tree growth and soil conditions on sites that were rehabilitated in 1991 in the British Columbia interior. The objectives of the work were (1) to document a minimum of 5 year's growth of lodgepole pine on rehabilitated landings, and compare it to growth on sites that were simply harvested, and (2) to document soil conditions affecting site productivity on the rehabilitated areas. ...

• Growth Intercept Models for Black Spruce
  http://www.for.gov.bc.ca/hre/pubs/pubs/1222.htm
  Growth and yield information about black spruce in British Columbia is sparse. To help alleviate this situation, growth intercept models were developed using data from 91 stem analysis plots. These models, which are more precise than those for other species in British Columbia, provide a means of estimating site index (site productivity) in young black spruce stands. ...