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Showing 1 to 20 of 37 for “"pine bark"”.
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Nitrification in a pine bark medium
… were grown in one-liter containers filled with pine bark, treated with and without a nitrification inhibitor and fertilized with 210 ml of a 100 ppm NH₄-N solution. Without the inhibitor and over time, “soil” solution NH₄-N concentrations and pH decreased and NO₃-N concentrations increased. …
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Absorption of nitrogen from a liquid by pine bark
… investigated the potential of Pinus radiata (pine) bark to absorb organic and ammoniacal-nitrogen, from an aqueous solution and from a dairy slurry, in the laboratory and in a field treatment of dairy slurry. Preliminary experiments indicated that the initial nitrogen concentration of the …
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Suction Cup Lysimeter Method for Extracting Pine Bark Substrate Solution
… (SCL) in extracting substrate solution from pine bark substrates. Lysimeter types tested were 4.8-cm diameter with a ½ or 1-bar air-entry value (AEV) and 2.2-cm diameter also with a ½ or 1-bar AEV. Sufficient volume could be obtained when a vacuum pressure of 30, 40 or 50 cb was applied to …
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Characterizing the physical and hydraulic properties of pine bark soilless substrates
Soilless substrates, such as peat, pine bark, and coir, are widely used as growing media in containerized crops for their favorable characteristics, including low bulk density, balanced air exchange and water retention, disease resistance, and low pH and salinity. However, improper irrigation of …
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Iron and manganese requirements of containerized plants growing in pine bark
… were grown in one-liter containers filled with pine bark to determine Fe and Mn requirements with regard to rate and ratio. FeEDTA and MnEDTA were applied at either a 2:1 or 1:2 ratio of Fe:Mn at 5 concentrations each, 3 times per week with each irrigation. Medium solutions were collected every …
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Phosphorus nutrition of Ilex crenata 'Helleri' grown in a pine bark medium
… nutrition of Ilex crenata 'Helleri' and pine bark P relationships. Branched liners of 'Helleri' holly were grown in a pine bark medium in which 0, 5, 10, 15, 20, 25, or 30 ppm P were maintained. Shoot dry weight increased as the pine bark P level increased to 10 ppm P, while root dry …
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Cost share payment and willingness to participate in Virginia's Pine Bark Beetle Prevention Program
Forest management practices which reduce southern pine beetle (SPB) risk benefit not only the landowners who perform them, but all those who draw benefits from southern pine forests in Virginia, especially other forest owners within the same region. One such management practice is pre-commercial …
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Effect of Micronutrient Rate on the Growth of Containerized Quercus palustris Seddlings in Pine Bark
… Q. palustris seedlings were container-grown in pine bark amended with the following rates of Micromax: 0, 0.15, 0.3, 0.6, 0.9, 1.8, or 2.7 kg(m-3 in 2000, 2001, and 2002. For all three years, the maximum growth was obtained at rates near the manufacturer's recommended rate of 0.9 kg(m-3. A …
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Influence of Lime and Micronutrient Amendments on Growth of Containerized Landscape Trees Grown in Pine Bark
… industry. In the southeastern United States, pine bark is often used as a container substrate, and two common amendments to pine bark are lime and micronutrients. In this study, three experiments were conducted to determine the effect of these amendments on the growth of a wide range of …
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Investigating the natural history and predator complex of the native pine bark adelgid (Pineus strobi) in southwestern Virginia
The pine bark adelgid, Pineus strobi (Hemiptera: Adelgidae) is a native herbivore of eastern white pine, Pinus strobus (Pinales: Pinaceae), in eastern North America. It is a sessile insect that settles on P. strobus and inserts its stylet bundle to feed on the tree’s phloem. Although P. strobi is …
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Overhead sprinkler irrigation strategies to reduce water and nitrogen loss from container-grown plants
… water distribution, and plant growth in a pine bark substrate. Intermittent irrigation was defined as the application of a plants' daily water allotment in multiple applications with prescribed intervals between applications. Specifically, experiments were conducted to determine: 1) the …
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Phosphorus Requirement and Chemical Fate in Containerized Nursery Crop Production
… [DL] and micronutrient fertilizer [MF]) added to pine bark substrates on chemical fate of P fertilizer. Four studies were conducted to accomplish two overarching objectives: 1) determine the minimum P fertilization amount and corresponding pore-water P concentration needed to achieve maximal …
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The effect of soluble salt concentration and two organic media on the growth and quality of Brassaia actinophylla and Dieffenbachia maculata "Lodd" G. Don
… and at 4.1 mmho/cm in the medium containing pine bark. The maximum Dieffenbachia growth and quality occurred at a conductivity of 0.8 to 1.3 mmho/cm. Brassaia growth and quality in medium 1 were poorest with application of 0.225 g/l 15-30-15 plus 1.5 g/l NaCl, and were more favorable with …
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Observations of mycorrhizal inoculation of pin and scarlet oak production in containers
… and Q. coccinea Muenchh. (scarlet oak) grown in pine bark, sterilized pine bark, sterilized mineral soil, and sterilized vermiculite-based substrates were inoculated with Pt commercial spore inoculum or Pt vegetative inoculum. The vegetative inoculum was unsuccessful at forming mycorrhizae even …
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Calcium and magnesium requirements of Ilex crenata Thunb. "Helleri"
… was performed on 'Helleri' holly growing in pine bark. Calcium was supplied at 0 and 120 ppm and Mg at 0 and 60 ppm. No differences in dry weight were observed. A third experiment studied the influence of four dolomitic limestone rates (0, 2, 4, and 8 kg/m³) and two gypsum rates (1 and 2 …
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Influences of supraoptimal root-zone temperature on the medium solution and growth of woody nursery crops
… containers than in insulated containers. In a pine bark medium, growth response of J. crenata, J. horizontalis, or N. domestica to increased N application rate was similar when root-zones were at 40°C for 6 hrs/day or more optimal growth temperature. In unlimed pine bark, root-zone temperature …
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Biology and Host-Range Testing of <i>Laricobius kangdingensis</i> sp. n. (Coleoptera: Derodontidae), a Newly Discovered Predator of Hemlock Woolly Adelgid, <i>Adelges tsugae</i> Annand (Homoptera: Adelgidae)
… gall adelgid, <i>Adelges abietis</i> (L.), and pine bark adelgid, <i>Pineus strobi</i> (Hartig)], the pine needle scale, <i>Chionaspis pinifoliae</i> (Fitch), and the woolly alder aphid, <i>Paraprociphilus tessellatus</i> (Fitch). In paired-choice oviposition tests, females laid more eggs on …
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Water and nutrient transport dynamics during the irrigation of containerized nursery crops
… water and solute transport principles through pine-bark based substrates. 1) Ilex crenata Thunb. 'Bennett's Compactum' were grown in 2.7 L containers. Tensiometers detected wetting front (WF) movement throughout the substrate during irrigation. 2) Tracer solution (containing NO3-, PO43- and K+) …
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The bio-ecology, economical importance and control of three saturniids injurious to forest trees
The pine emperor Nudaurelia cytherea clarki Geertsema, the poplar emperor, Pseudobunaea irius (F.) and the pine-bark emperor, llolocerina smilax (Westw .), are three important defoliators of especially Pinus patula Schlechtd. & Cham. trees. These studies were undertaken to gain more knowledge of …
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The influence of bed cover type (gravel vs plastic) on container-grown plants
… Ilex crenata Thunb. ‘Bennets Compacta’ in 11.4 L pine bark-filled containers. Measurements included bed cover, substrate, and plant canopy temperatures; evapotranspiration, stem water potential, and plant widths were also determined. The objective of Expt. 2 and 3 was to determine the amount of …
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