The Variations in Form of Mycorrhizal Short-roots of Pinus Virginiana Mill. Associated with Certain Soil SeriesLandenberg Laboratory, 1941 - 20 pàgines |
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added organic matter arca attenuate Barrons black humus layer Cecil County Chester County CHESTER LOAM Chester soil clay or silt coastal plain CONOWINGO SOILS coralloid branches coralloid mycorrhizae Cornell University Cowenton cvident Dekalb soil Delaware Derived from weathering East Nottingham elongate ericaceous shrubs FORM OF MYCORRHIZAL four radically diverse fungi fungus fungus-root ground cover habitat heavy clay higher plant humus soil inclined to drought Iron Hill Landenberg Maryland material microorganisms mycor mycorrhizal form nodulous oak woods orchids Pennsylvania pincs grow pine Pinus Virginiana Pinus Virginiana Mill preceding soil series preeminently mycorrhizal pseudomycorrhizal form pure white colour racemose renewed growth reproduce freely rhizomorphs rhizothamnic root system root-hairs root-tips sand sandy soil Sassafras soil sccdling scil Scrub pinc occurs Scrub pine Pinus seedlings were dug serpentine short roots silt soils symbiont tips of renewed trecs trees growing undulant Vaccineae Valley Forge weft with hyphae well-drained white rootlets white tips