Zobrazeno 1 - 10 of 29 pro vyhledávání: '"C. T. Youngberg"'
1
Tripartite associations in snowbrush (Ceanothus velutinus): effect of vesicular–arbuscular mycorrhizae on growth, nodulation, and nitrogen fixation
Autor: S. L. Rose, C. T. Youngberg
Publikováno v: Canadian Journal of Botany. 59:34-39
Symbiotic associations were established between nitrogen-fixing nonleguminous (actinorrhizal) snowbrush (Ceanothus velutinus Dougl.) seedlings and two categories of microorganisms: vesicular–arbuscular (VA) mycorrhizal fungi and a filamentous actin
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d615f8d4605c03dcf5a5eb80b6498985
https://doi.org/10.1139/b81-006
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2
Effects of Landslide Erosion on Subsequent Douglas-fir Growth and Stocking Levels in the Western Cascades, Oregon
Autor: F. J. Swanson, D. W. R. Miles, C. T. Youngberg
Publikováno v: Soil Science Society of America Journal. 48:667-671
Shallow, rapid landslides are common events in steep terrain of the Pacific Northwest. The effect of landslides on timber growth potential of forest land was estimated by examining a 30-yr history of clearcutting and landsliding in the western Oregon
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::52d688d2cd12cb316657535cba8fa5b0
https://doi.org/10.2136/sssaj1984.03615995004800030040x
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7
Relation of Soils and Forest Growth in the Driftless Area of Southwestern Wisconsin
Autor: C. T. Youngberg, Philip B. Whitford, S. A. Wilde
Publikováno v: Ecology. 29:173-180
I he distribution of native vegetation and the rate of forest growth in relation to soils were studied on two transects. One of the transects extended for about 4 miles in Iowa and Sauk Counties; it crossed the Wisconsin River in a southnorth directi
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::24b1ff84e17aab9112f0faad51e293df
https://doi.org/10.2307/1932812
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8
Biological Assay of Pumice Soil Fertility
Autor: C. T. Youngberg, C. T. Dyrness
Publikováno v: Soil Science Society of America Journal. 29:182-187
The fertility of pumice soils is difficult to assess by laboratory analysis. A biological assay of growth responses yields more meaningful information. Four pumice soils common in central Oregon were assayed in the greenhouse using ponderosa pine as
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5e85590c6f0957c9ff2788e3ad638bdd
https://doi.org/10.2136/sssaj1965.03615995002900020021x
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9
Effect of Soils on the Establishment of Tree Crops
Autor: C. T. Youngberg
Publikováno v: Soil Science Society of America Journal. 19:86-90
Published January 1955. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::67e18ed088075d3a6ebcd1502faaa23d
https://doi.org/10.2136/sssaj1955.03615995001900010022x
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10
Some Site Factors Affecting the Success of Reforestation and Afforestation Activities in the Willamette Valley Foothills
Autor: C. T. Youngberg
Publikováno v: Soil Science Society of America Journal. 19:368-372
The majority of the land in the low-lying hills adjacent to the Willamette Valley is not suited for agriculture due to the nature of the soils and topography, and supports a cover of Douglas fir, mixed Douglas-fir-Oregon white oak, and oak stands. Sc
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ccdef85720d94f98ce35c084a1cf5f22
https://doi.org/10.2136/sssaj1955.03615995001900030029x
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