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Showing 1 to 17 of 17 for “"Root density"”.
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Effects of bank vegetation in waterways with special reference to bank erosion, shear strength, root density and channel hydraulics
… of moisture content is studied. The role of roots of bank vegetation with special reference to possible effects on bank shear strength is addressed. It is concluded that there is no clear correlation between shear strength and erosion. Shear strength of the upper bank as measured in situ, by …
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Characterizing Low Nutrient Stress Resistance in Crop Sunflowers (Helianthus annus)
… using height, stem diameter, biomass, and root structure traits. Sunflowers responded to nutrient stress through a decrease in overall size and increased root width near the surface and steeper lateral root angles. Height, stem diameter, biomass, root mass, root area, and root density were …
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Switchgrass Cultivar, Harvest Frequency, Fertilizer Source, and Irrigation Effects on Near-Surface Soil Properties in West-Central Arkansas
… Center in Logan County by evaluating soil bulk density, total water stable aggregates (TWSA), soil pH and EC, Mehlich-3 extractable soil nutrients, root density, and surface infiltration. Irrigating switchgrass, which did not increase past biomass production, increased (<em>p</em> > 0.01) soil …
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Stable isotope analysis as an indicator of tree and grass rooting depth in a mesic African savanna
… Hypothesis, which states that trees and grasses root at different depths and subsequently exploit different soil moisture layers. Root samples were extracted from vertical soil profiles in open and under canopy cover and analysed by means of carbon nitrogen isotopes. While δ¹⁵N showed little …
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Enhanced petroleum-contaminated soil bioremediation by plants
… species in terms of transpiration potential and root density in order to better understand the mechanisms involved in phytoremediation. Clay sandy soil (3: 1, by weight) was spiked with Fuel oil No.2 and allowed to weather for 1 week before it was placed in the pots. Under all study treatments, …
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Probabilistic estimation and prediction of groundwater recharge in a semi-arid environment
… antecedent soil conditions, and below-maximum root density. El Niño events can contribute to interannual variability of percolation by bringing wetter winters, which produce modest percolation events and provide wet antecedent conditions that trigger spring episodic recharge.
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Effects of Elevated Atmospheric CO2 on Root Dynamics, Biomass and Architecture in a Scrub-Oak Ecosystem at Kennedy Space Center, Florida
… ecology lies with our understanding of root system growth, function and distribution. Large belowground structures, in addition to fine roots, are of particular interest because of their role in carbon sequestration. Non-destructive methods, including ground-penetrating radar (GPR) and …
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Nutrient Foraging in Ten Southeast Coastal Plain Plant Species
Plant root system response to nutrient heterogeneity was tested in ten plant species of varying life form and successional status. All plants tested are native to the South Carolina coastal plain. Morphological responses of the root system (scale, precision and discrimination) and overall plant …
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Analysis of flow patterns and flow mechanisms in soils
… type of vegetation (permanent or seasonal, deep rooted or shallow rooted) it is possible to compare different study sites or to consider the same site at different boundary conditions and to access the risk of vertical solute propagation. Pattern analysis based on the risk index for vertical …
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Acoustic Behavior Of Soil Reinforced With Grass Roots
… engineering practice has shown that vegetative roots on slopes and streambanks can substantially increase shear strength of soil and reduce erosion. Research has been done to understand and quantify the effect. Most studies have been conducted on slopes and streambanks with woody vegetation. …
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The Geomorphic Effects of Native and Invasive Riparian Vegetation: Sprague River, Oregon
… Oregon. I conducted field research that included root density and root strength surveys to determine the below ground influences of vegetation in terms of added bank cohesion provided by the invasive and two similar native species: Eleocharis palustris and Carex vesicaria. To ascertain differences …
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Differential Response of a Virginia Common Lambsquarters (Chenopodium album) Collection to Glyphosate
… differences were observed with regard to root weight, root length, and root density. In germination studies, it was determined that the Montgomery source had significantly faster and greater seed germination than the Westmoreland source. The susceptibility of F3 seedlings to glyphosate …
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Plant communities in field margins of agricultural landscapes: species distributions, functional traits, and contributions to landscape function
… measures were mainly affected directly by root density, while PFTs and soil texture exerted indirect effects through root density and vegetation parameters, respectively. Including ITV improved model explained variance and goodness-of-fit in all cases. In the third study on the effect of …
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A Lateral Root Defect in the wag1-1/wag2-1 Double Mutant of Arabidopsis
The root system architecture of higher plants plays an essential role in the uptake of water and nutrients as well as the production of hormones. These root systems are highly branched with the formation of post-embryonic organs such as lateral roots. The initiation and development of lateral roots …
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Coarse Root Biomass and Architecture: Applications of Ground Penetrating Radar
… radar (GPR) to identify and quantify coarse roots was tested in a mixed-oak forest in Southeastern Virginia using experimental pits and locally excavated root segments. GPR was found to be highly dependent on low soil moisture levels as it is unable to differentiate root structures if they …
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Strip-till and no-till soybean growth and distribution of roots and soil phosphorus, potassium, and water with broadcast and subsurface-band fertilization
… placement on soybean [Glycine max (L.) Merr.] root distribution, shoot growth and nutrient accumulation, seed yield and seed composition; and to quantify treatment effects on the distribution of P, K, and water in the soil. A three-year field experiment was conducted in Champaign, Illinois on …
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ΣΥΜΠΕΡΙΦΟΡΑ ΤΗΣ ΕΛΗΑΣ ΣΕ ΔΙΑΦΟΡΕΣ ΣΥΝΘΗΚΕΣ ΑΡΔΕΥΣΗΣ
ΜΕΛΕΤΗ ΤΗΣ ΣΥΜΠΕΡΙΦΟΡΑΣ ΤΗΣ ΕΛΗΑΣ ΣΕ ΔΙΑΦΟΡΕΣ ΣΥΝΘΗΚΕΣ ΑΡΔΕΥΣΗΣ. ΕΓΙΝΑΝ ΠΕΙΡΑΜΑΤΑ ΣΤΙΣ ΠΟΙΚΙΛΙΕΣ ΚΑΛΑΜΩΝ, ΑΜΦΙΣΣΗΣ ΚΑΙ ΚΟΡΩΝΕΙΚΗ ΜΕ ΤΑ ΟΠΟΙΑ ΜΕΛΕΤΗΘΗΚΑΝ: (Α) Η ΕΦΑΡΜΟΓΗ ΤΟΥ ΝΕΡΟΥ ΜΕ ΔΙΑΦΟΡΕΣ ΜΕΘΟΔΟΥΣ ΑΡΔΕΥΣΗΣ ΟΠΩΣ ΣΤΑΛΑΚΤΗΡΕΣ ΔΙΑΦΟΡΟΥΠΑΡΟΧΗΣ, ΛΕΚΑΝΕΣ Κ.Λ.Π. (Β) ΕΠΑΝΑΛΗΨΗ ΤΩΝ ΑΡΔΕΥΣΕΩΝ ΣΕ ΔΙΑΦΟΡΑ …