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Rights Statements InC/1.0 , Open Access
Journal article
Influence of western juniper development on distribution of soil and organic layer nutrients
Northwest science., Vol.74(1), pp.1-11
2000
Handle:
https://hdl.handle.net/2376/1072
Abstract
The purpose of this study was to determine effects of invading western juniper (Juniperus occidentalis Hook.) into big sagebrush (Artemisia tridentata Nutt.)/bluebunch wheatgrass (Agropyron spicatum (Pursh) Scribn. and Smith (now Pseudoroegneria spicata)) ecosystems of central Oregon on spatial distribution of nutrients in organic and mineral soil layers. The organic layer and mineral soil from four layers (0-5, 5-15, 15-30, and 30+ cm), were collected beneath juniper trees of five size classes, and one area devoid of juniper on five replicated sites. Samples were taken at five distances (0 to 4 canopy radii) from tree boles into intercanopy areas. The organic layer and mineral soil were analyzed for organic carbon (Corg), total nitrogen (N), total phosphorus (P) and total sulfur (S); mineral soil was analyzed for exchangeable calcium (Caex), magnesium (Mgex) and potassium (Kex). Mass of the organic layer and amounts of organic layer nutrients increased with juniper size, and were higher under canopies than in intercanopy and no juniper areas. Concentrations of organic layer N, P, and S declined with distance from tree boles. Tree size, distance and soil layer interacted to affect concentrations of soil Corg, Kex, Caex and Mgex. Concentrations of soil N and S increased with tree size. Amounts of soil nutrients, except Corg, were not significantly influenced by tree size, but amounts of all soil nutrients, except S and Caex, were greater under juniper trees than intercanopy areas. Only Caex and Mgex appeared to have been lost from intercanopy soils compared to no juniper soils
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Details
- Title
- Influence of western juniper development on distribution of soil and organic layer nutrients
- Creators
- James O. Klemmedson (Author)Arthur R. Tiedemann (Author)
- Publication Details
- Northwest science., Vol.74(1), pp.1-11
- Academic Unit
- Northwest Science
- Publisher
- WSU Press
- Identifiers
- 99900501980601842
- Copyright
- In copyright ; openAccess ; http://rightsstatements.org/vocab/InC/1.0/ ; http://purl.org/eprint/accessRights/OpenAccess
- Language
- English
- Resource Type
- Journal article