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Wednesday, July 29, 2020 | History

2 edition of Internal moisture relations of standing Douglas-fir trees injected with organic arsenicals found in the catalog.

Internal moisture relations of standing Douglas-fir trees injected with organic arsenicals

Harvey A. Holt

Internal moisture relations of standing Douglas-fir trees injected with organic arsenicals

by Harvey A. Holt

  • 19 Want to read
  • 15 Currently reading

Published .
Written in English

    Subjects:
  • Douglas fir -- Moisture.,
  • Moisture -- Measurement.

  • Edition Notes

    Statementby Harvey Allen Holt.
    The Physical Object
    Pagination[12], 137 leaves, bound :
    Number of Pages137
    ID Numbers
    Open LibraryOL14251353M

    CHANGE IN MOISTURE CONTENT. Wet air expands wood, dry air shrinks it. Use a moisture meter to note the highest moisture content (MC) in your wet season and the lowest in your dry season. Subtract the smaller number from the larger one to find the yearly change. Most climate-controlled houses change 3 percent to 4 percent MC during a Size: KB. Kiln Dried Doug Fir Lumber Kiln Dried Douglas Fir Lumber Having built a solid, nationwide reputation on our high-quality “Socomi Brand” green Doug Fir products, South Coast Lumber Co. has responded to marketplace demand by expanding and upgrading our manufacturing facilities to produce kiln dried Doug Fir (KDDF) lumber.

    With a moisture meter, check the MC for the lumber that you are using to glue up the panel Douglas Fir 10 8 12 9 Pine, Eastern White 10 4 12 4 13 5 15 Redwood 11 6 12 7 14 Spruce, Sitka 10 7 12 8 14 9 File Size: 17KB. Nitrogen and Phosphorus Fertilizer Requirements for Young Bearing Microsprinkler-Irrigated Citrus Report. Best Fertilizer Douglas Fir such a fertilizer will according to claims “enhance winter hardiness” of our grass. Also about one time per month water the orchids without any orchid fertilizer.

    A flat slab of Douglas fir wood mm thick containing 30 wt% moisture. is being dried from both sides (neglecting edges and ends). The equilibrium moisture content at the surface of the wood due to the drying air blown over it is held at 5 wt% moisture. Abstract. Between and , the British Columbia Forest Productivity Committee established permanent-yield plots to determine the effects of fertilizing and thinning on immature Douglas-fir (Pseudotsuga menziesii) and western hemlock (Tsuga heterophylla).


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Internal moisture relations of standing Douglas-fir trees injected with organic arsenicals by Harvey A. Holt Download PDF EPUB FB2

Holt, H.A. Internal moisture relations of standing Douglas-fir trees injected with organic arsenicals. Ph.D. thesis, Oregon State University College of Forestry, Corvallis, Oreg. Douglas fir (Pseudotsuga menziesii L.) particles were exposed to high pressure saturated steam ( and °C for 5 and 10 min) to improve the durability and hydrophobicity of pellets produced from ing on treatment severity, the moisture content of the particles increased from 10% to 36% (wet basis).

Douglas fir particles steam-treated at °C for 10 min had the fastest drying Cited by: moisture content reaches the fiber saturation point, about 28 to 30%. As a point of reference, millwork in the interior of a home will reach an annual average equilibrium moisture content (EMC) of somewhere between 6 and 13%.

Relationship of Moisture Content to Standard Sizes Moisture content standards are applied to the lumber at theFile Size: 46KB. Douglas-fir Shrinkage and Dimensional Stability Douglas-fir is an important building timber in North America, particularly in the Pacific north West, where it has a reputation for being naturally dimensionally stable – the ability to “season well in position” and retaining its shape during use (WWPA, ).File Size: KB.

30 m x 85 m ( ha), with an internal 15 m x 70 m ( ha) measurement plot. The treat­ ments examined in this study are • Bole-only without vegetation control (BO -VC): Only the merchantable stem portion of harvested trees (to an upper stem diameter of.

5) that has been used to fit equilibrium moisture relations of biological materials such as energy sorghum [18], Douglas fir [40], poultry litter [28], starch foam [41], banana flour [42], and. The effect of moisture content and prechill duration on dormancy breakage of Douglas fir seeds (Pseudotsuga menziesii var.

menziesii [Mirb.] Franco) - Volume 13 Issue 3 - Peter G. Gosling, Yvonne Samuel, Andrew PeaceCited by: 9. nutrients of Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) and western hemlock (Tsuga heterophylla (Raf.) Sarg.). Both pole-size trees in closed-canopy stands and potted seedlings were use d.

Soil series were Bunker for Douglas-fir and Klone for western hemlock in experiments 1. Douglas fir is a resinous wood and the resin canals can occasionally leak and bleed, marking the wood with tiny lines most visible on longitudinal surfaces.

Physical Properties Douglas fir is very dimensionally stable and has a moderate resistance to shock, high stiffness. A pin meter can be used to measure the moisture in Douglas fir.

Q: What types of moisture meters are there. A: Pin and pinless models are two of the most common types of wood moisture meters. The latest models have an LCD screen.

Wood moisture meters should also have settings specific to ‘wood species’. An attempt was made to develop regression models to describe soil moisture use as a function of cumulative open-pan evaporation, soil depth, standing biomass of herbaceous vegetation, fresh weight of trees, root distribution of the herbaceous vegetation, and Cited by: 1.

The chemical properties of Douglas fir bark are the most important for understanding nutrition in container crops. These photos show one of the bark suppliers in Oregon. It’s important to note that Douglas fir bark is often ‘aged’, or stored in large piles for 3 to 7 months.

It is not composted. Composting would require that it be stored inFile Size: 1MB. Biomass and nutrient content of Douglas-fir logs and other detrital pools in an old-growth forest, Oregon, U.S.A. Can. For. Res. Logs, forest floor, and mineral soil were sampled and measured, and snags were measured, in a year-old Douglas-fir.

Characterization of the internal water relations of loblolly pine seedlings in response to nursery cultural treatments: Implications for reforestation success. In:(M. Duryea and G.

Brown, eds., Seedling Physiology and Reforestation Success. –Cited by: 1. Introduction. Coarse woody debris (CWD) plays important roles in maintaining the structural and functional integrity of forest ecosystems.

For instance, fallen trees can help stabilize soils, and provide habitat for invertebrates and vertebrates (Harmon et al., ).An improved understanding of CWD decomposition will help to assess the role that CWD has in C sequestration in forest Cited by: Depending on treatment severity, the moisture content of the particles increased from 10% to 36% (wet basis).

Douglas fir particles steam-treated at °C for 10 min had the fastest drying rate of min(-1). The equilibrium moisture content (EMC) of steam-treated samples decreased with increasing steam temperature and treatment by: It should be noted that continued additions of arsenicals, regardless of the source, may result in soils that are too toxic to support some forma of plant life.

The constant turnover of organic matter and the resulting microbial reduction and volatilization (see Figure ) will tend to reduce high con- centrations of arsenicals. Title: Kiln drying douglas fir common lumber Author: Forest Products Laboratory Subject: no; ; year: January 20 Keywords: Kiln drying; Douglas fir.

With Douglas fir timbers, the moisture saturation point is between 24% – 28%. The reason Naturally Dry timbers perform is that they have already passed through the moisture saturation point prior to cutting.

Lastly, we have been sourcing Naturally Dry timbers for years from multiple locations across the Northwest. It is our experience that. In spring2-year-old bare-rooted seedlings of Sitka spruce (Picea sitchensis (Bong.) Carr.) and Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) were exposed for 0,or 3 h in a controlled environment room at 20°C.

Plants were desiccated in batches during February and March; seedlings of each species were planted in 5 plant plots at each of 6 planting sites using Cited by:. The Douglas-fir forest residues sample as received with a moisture content of % was fractionated through siev-ing. A total of 9 kg (wet weight) was processed through a nested stack of 11 sieves.

The sieve sizes were,, and mm. The set of sieves was placed on the horizontal sieve shakerCited by: Graduate Thesis Or Dissertation Determining moisture content and moisture sorption in Douglas-fir bark Public Deposited. Analytics × Add to Cited by: 5.The ideal conditions of the Coast Douglas Fir have been compared to those of the different Spruce species.

They prefer soil that is moist, and slightly acidic, and grow best in areas where they receive full sunlight. Some of the factors that result in an unsuitable climate for the Coast Douglas Fir are: high seasonal winds, heavy and wet.