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North Idaho Nutrition Guidelines by Rock Type Item Info
- Title:
- North Idaho Nutrition Guidelines by Rock Type
- Creator:
- Garrison-Johston, M.T.; Moore, J.A.
- Date Created (ISO Standard):
- 2001-07-30
- Description:
- This document was prepared as a guideline for foresters to use in determining appropriate nutrient management strategies for forest stands on various rock types in north Idaho and portions of northeastern Washington. The guidelines proposed in this document are based on both observational and experimental evidence compiled by the Intermountain Forest Tree Nutrition Cooperative (IFTNC) since its inception in 1980. Nine digital geologic maps covering most of north Idaho and portions of northeastern Washington were compiled for this report. A location map showing the maps used in this compilation is shown in Appendix A. Four of these maps, the Headquarters, Missoula West, Kookia and Hamilton 1:100000 quadrangles, are in preliminary form. Expect the map units to change over time. Stands in these areas MUST be field checked for rock type before proceeding with nutrient management decisions. A listing of all rock units from each of the nine maps was extracted, for a total of approximately 435 rock units. Each of these rock units was assigned to one of 59 lithology groups, labeled as 'LITH_GRP' A complete listing of rock units by map is shown in Appendix D, along with a brief description and the corresponding lithology grouping. Each rock unit was also assigned to one of four broad categories, labeled 'CATEGORY.' These four categories include extrusive/ basaltic rocks, intrusive/ granitic rocks, metamorphic rocks, and mixed rocks. The following section of the report discusses nutrient management strategies for each rock category. Within each category, the guidelines are further subdivided based on the lithology groupings. These guidelines are based on the current state of knowledge regarding rocks and forest growth. We fully expect these guidelines to be further refined with additional experience and experimentation. Caveats: Geology maps are a useful tool in forest management. However, the user must be aware that geology maps were not developed for use at the forest stand level. We have found the updated north Idaho geology maps to be very good for giving a general idea of the rocks likely to be found in a particular area, and often the maps are precise to the stand level. Nonetheless, foresters must always verify the rock type in the field before considering fertilization options. The information included in this report is intended only to provide general guidelines to be considered in the formulation of silvicultural prescriptions.
- Subjects:
- research geological maps fertilizer forest management
- Location:
- North and Central Idaho Eastern Washington Western Montana Northeastern Oregon
- Source:
- Garrison-Johnston, M.T., and J.A. Moore. 2001. North Idaho Nutrition Guidelines by Rock Type: Version 1.1.* Corrected category lables. IFTNC College of Natural Resources, Univ. of Idaho, Moscow.
- Source Identifier:
- North_Idaho_Nutrition_Guidelines_By_Rock_Type_IFTNC_2001
- Type:
- Text
- Format:
- application/pdf
Source
- Preferred Citation:
- "North Idaho Nutrition Guidelines by Rock Type", Intermountain Forestry Cooperative, University of Idaho Library Digital Collections, https://www.lib.uidaho.edu/digital/iftnc/items/iftnc4833.html