Sapwood Ebooks Catalog
Description Handsome and naturally rot resistant. Use common-grade redwood for framing members, decking, and railings use construction- or clear-heart for posts and for near-ground structural members. Appearance Redwood's distinctive red hue weathers to a brown-gray. Preserve original color by applying sealer every other year. Cost The most expensive way to go. To save money you might want to use redwood only for parts that show, as we did with the raised deck on pages 176 179-Comments Redwood boards go down flat and stay flat, and because they contain little or no pitch or resin, they are easier to saw, drill, and shape than treated lumber. PRESSURE-TREATED LUMBER Description Fir, pine, and other softwoods saturated with chromated copper arsenate. Above ground, use wood treated to .25 pounds per cubic foot (pcf). Posts and other ground-level members need .40 pcf wood. Appearance Some comes prestained to resemble redwood or cedar. Most has a greenish cast that weathers to a silvery...
Soft wood is the most immature part of a stem, and, when propagating, it is the most difficult kind of cutting to keep alive. However, soft wood does have the highest capacity of all kinds of stems to produce roots the younger and the more immature the cutting, the greater will be its ability to develop roots, and so propagate successfully.
The National Research Council has estimated that hypersensitivity to chemicals in common household products results in acute or chronic health problems for about 15 percent of the population, says herbalist and educator Louise Gruenberg of Oak Park, Illinois. She has spent 20 years developing safe and effective natural cleaning formulas. For the sake of my family's health, 1 don't mind the extra time it takes to make my own cleaning products, says Louise, This formula is great for tough jobs like vinyl floors, walls, woodwork, and furniture.
This rule of texture also applies to hardscape. For instance, sometimes a surface made of large tiles looks great in a small space because the texture is unexpected and it makes the area seem roomier than it is. The texture of paving, walls, woodwork, and other man-made elements contributes greatly to the overall effect of the landscape.
Since earliest times man has put the forest and its products to innumerable uses particularly for food and shelter. Some of these have declined in importance with the increased use of coal, oil, steel and synthetic chemicals but nevertheless it would be difficult to picture life as we know it today without trees. Formerly, when the population was sparse, there was sufficient natural forest to supply all the timber needed. However, as demand outstripped supply it became necessary to plant trees specially for their wood so that today forestry is a flourishing industry even in a small country like Britain. Hardwoods are obtained mainly from broad-leaved trees, e.g. Oak and Beech, but such species grow slowly and today preference is given to quicker growing conifers which yield softwoods. Large ships are no longer built of timber but vast quantities of hardwood are used for furniture-making and turnery. Softwoods too are employed for making furniture but far larger amounts are used in...
A quinone, sissoidenone and dalbergion, latifolin and dalbergin have been isolated from the heartwood also oleanolic acid, liquiritigenin and isoliquiritigenin. The sapwood and young leaves gave sissotrin. Biochanin A, isolated from young leaves, inhibited both serum and epidermal growth factor (EGF) stimulated growth of human prostate cancer cell lines.
Raised bed gardening is becoming more and more popular today. The raised soil is framed with stone walls, bricks, logs, adobe, railroad ties, redwood boards or something similar. Raised beds solve a number of gardening problems, especially those associated with backyard gardens. For instance, they -
A good pair of loppers has long, strong shafts of steel, fiberglass, or hardwood. At the ends, where you grip them, you want either vinyl or rubber handles, just to alleviate vibrations from cutting and make the work more comfortable. At the top, the curved hook and blade ought to be tough metal such as forged carbon steel sharp, of course, and beveled. The point where these two elements come together needs to be strong and secure look for strong, stout pins or rivets, as well as rubber bumpers.
The shafts are either light but tough tubular steel or heavier hardwood, usually with cushioned grips to make your work more comfortable and your grip more secure. The cutting blades are long and sharp, the cutting edge is ideally beveled, and the base (near the fulcrum) may have serrations for those occasions when you encounter especially tough branches.
In the past, I have experimented with different types of paths in the vegetable garden. Mulched paths have the advantage of being soft to walk on, control weed growth, and need only to be topped up regularly with extra mulch material. However, after trying out several types of garden design, I now find that if the garden beds are edged with hardwood boards or secondhand railway sleepers, the best paths are grassed ones.
The oleoresin in the resin ducts of conifers has some of the same biological functions as the phenolics released in the heartwood. What is the adaptive sig niftcance of these chemical compounds to a long-living organism How can we possibly exploit the compounds found in the oleoresin or phenolics for our own use
If you must buy composting bin, look for a simple bin made of recycled plastic y JV (Figure 16-2 also shows an upright compost bin). The bigger the better piles 1 11 around 3 x 3 feet heat up better than smaller ones. Throw plant parts in the top and periodically pull finished compost out the little door in the bottom. No muss, no fuss, no turning. Or get a tumbler-type bin and give it a spin once in a while. You can also build a series of bins out of concrete block, scrap wood, or other sturdy material for the dividers. You want to turn the compost in a bin system a concrete floor makes that easier.
These plants are primarily pruned to increase the density of the foliage or to reduce the size of the plant. Conifers have lateral branches that arise from the trunk in whorls or as random shoots. Preformed latent buds in the terminal determine the number of branches. Few conifers have latent buds below the foliage area on old wood. When these plants are pruned back to the older wood, there are no new buds to break and generate new foliage. Pine, spruce, fir, dawn redwood, Cryptomeria and cypress have few, if any, buds on old wood. Juniper and yew have numerous buds in the foliage but few on
Root systems vary in size from those of a seedling, perhaps a few inches long, to those of a 300' redwood that can grow larger in size than the visible tree itself Regardless of the physical size of the plant, roots serve three essential functions (1) the uptake of water and nutrients (2) storage for manufactured materials (3) providing physical support for the plant above ground. Hydroponics is all about healthy roots The absorption of water and nutrients takes place just behind the root tip through tiny root hairs. These root hairs are extremely delicate and usually die off as the root tip grows further into the medium. The method in which the roots absorb water and nutrients is called diffusion. In this process, water and oxygen pass into the root structure through membranes in the cell walls. An interesting point is that diffusion actually takes place at the ionic level, which in laymen's terms means nutritional elements are passed by the electrical exchange of charged particles....
The technique of wounding can be very effective with rhododendron, daphne and juniper, but it is unwise to use it as a matter of course as it provides another possible site for infection and rotting. It may only be necessary on older, hardwood cuttings softwood cuttings do not normally require wounding. The need to wound a cutting will only be discovered in the light of experience a continued failure to root a cutting, which cannot be attributed to any other cause, may then suggest that the cutting may respond to wounding.
The author poses besides a 300 ft. tall Redwood whose roots spread just as far below the surface to provide food and support for the massive tree. The author poses besides a 300 ft. tall Redwood whose roots spread just as far below the surface to provide food and support for the massive tree.
Most greenhouses today require do-it-yourself installation. Those with glazing in place go together faster than unglazed systems. Both aluminum frame and wood frame greenhouses are bolted together. Some firms offer a hot-line for do-it-yourselfers who need help. Most greenhouses today require do-it-yourself installation. Those with glazing in place go together faster than unglazed systems. Both aluminum frame and wood frame greenhouses are bolted together. Some firms offer a hot-line for do-it-yourselfers who need help.
Decomposed granite (also known as d.g.) is a compacted granular material that develops loose particles on the surface. For safety's sake and to avoid tracking the particles into the house (where they can do a number on hardwood floors), it's a good idea to sweep the particles off.
To make a wooden bottom for a wire cage, attach four pieces of 1 X2 inch pine lumber 4 feet long in a box shape with two deck screws at each corner. Then cut and shape your chicken wire or fencing wire to the 4x4 box to create any height you want. Staple the wire to the wood frame using Vs-inch staples, and then wire or tie the vertical corners together or wherever the wire forms a corner. If you are using chicken wire or any wire that has sharp edges, you may want to cover the sharp points including where the wire is stapled to the wood with something like duct tape (choose a nice color) to prevent getting scratched while you're moving your cover. Another way is to attach the wire to the inside of the 1 X2 frame. Its a little more work to staple the wire to the inside, but there wont be any Brace the frame with your foot sharp points to scratch you. If you have a couple of these cages made Once the wire is bent on all sides, remove the wood frame and connect the four corners at three...
Tunnels for 2-3 years in the heartwood. It has bacteria in its gut which help to digest the xylem tissue that it eats. It eventually reaches 5 cm in length, pupating in the tunnel, and finally emerging from the branch the following summer as the adult. Spread is only by adults.
The taking of heel cuttings is a traditional way to propagate plants from stem cuttings. It is a widely used method of removing a stem utting from a plant, and it is quite possible to make heel cuttings of softwood, greenwood, semi-ripe, hardwood or evergreen stems. roots, for example those that are planted in autumn and have to survive through the winter before rooting, or those hardwood cuttings that are planted in a cold frame. Heel cuttings are also made from softwood and greenwood stems that are left to develop in partially controlled environments, such as a propagator. Heel cuttings can be taken at any time of year. Trim the tail on the heel and any leaves near it. Remove some of the tip on semi-ripe and hardwood cuttings. Dip the cutting in a rooting hormone. Plant hardwood cuttings straight into the ground semi-ripe and sub-shrub cuttings in a cold frame and less hardy cuttings in the protected environment of a propagator. Label and water them in with a fungicide. Mallet...
Large rays easily visible with unaldod oyo. broad and conspicuous, and very line rays Just visiblo with hand lens wood hard pale sapwood and cream lo doop brown hoartwood Quorcus (oak) Each year a tree grows, it lays down more wood (secondary xylem). The vessel elements, tracheitis, and fibers arc dead during the first year they are produced. In contrast, the parenchyma cells in die xylem rays arc living. As the years pass, the parenchyma in the inner regions of the wood die. This inner core, the heartwood, and is no longer living tissue, yet it continues to give the tree support against gravity and wind. The wood on the outside, the sapwood, maintains the function of water conduction. As sapwood becomes heartwood, darkening often occurs. The dark color is due to deposition of various chemicals, including tannins, dyes, and oils. These chemicals come from the dead parenchyma cells of the rays. Often these parenchyma cells also form tyloses in the adjacent vessels. The change from...
What are the uses to which we put forests The major uses are as newsprint and packaging material. Even the few remaining primeval forests are being cut for this. Forests that had never seen the footsteps of man, that had never experienced any human interference, are being cut for newsprint. Those are forests in which the trees may be 200 feet to the first branch, gigantic cathedrals. They are being chipped. There are trees in Tasmania much taller than your redwoods. These are being cut and shipped out as chips. So, for the most part, we are degrading the primeval forests to the lowest possible use. Mining is also a major factor in salting on a local basis, and has accounted on its own for the loss of whole hardwood forests in areas of Western Australia and no doubt elsewhere. Mining brings up a lot of residues which are evaporated on the surface.
The most popular design which has been carried over and improved upon from the third edition. This system requires a little more skill and experience with power tools. Suitable for indoor and outdoor use and for growing any type of plant from lettuce to tomatoes. No Redwood or plam trees please Be sure to support taller, heavy plants with trellis or vine lines. Use with a 250W-400W grow light indoors.
The above diagram and photos below show a simple sawdust toilet permanently built into a toilet room. The compost receptacle (bucket) sits directly on the floor. A standard toilet seat is attached to an 18 square piece of plywood, which lifts on hinges to allow easy access when removing the compost material. Bucket setback from the front edge of the plywood is 1&1 2 . Top surface of plywood is 1 2 lower than top of bucket rim allowing bucket to protrude through cabinet to contact bottom of toilet seat ring. Plastic bumpers on bottom of toilet seat ring are swiveled sideways so as to fit around bucket. Actual toilet shown below. This toilet produces no odor.
The conifers are Gymnosperms and, unlike the broad-leaved trees, their seeds are not enclosed in an ovary. As the name of the group implies, they bear cones. The pollen grains and ovules are always produced on different cones which usually occur on the same tree. Male cones. These are small and consist of a central axis bearing lateral scales which have two to five pollen sacs on their under surfaces. When mature the sacs split open and the dry powdery pollen grains are released. Female cones. At the time of pollination these are small and possess few to many complex scales attached to the central axis. On the upper surface of each scale there may be one (Monkey Puzzle), two (Pine) or several (Redwood) ovules.
Dig a rectangle about 6 -8 inches deep beside the wall. Using scrap lumber or plywood, build a frame with sides the slope down toward the front a 6 inch slope is sufficient. Make sure the front is high enough (about 18 inches) to accommodate your shortest bonsai. Then set the frame againt the wall and spread 3 - 4 inches of gravel in the bottom.
An alternative to purchasing vines is to propagate vines from cuttings of a known variety. (It is illegal to propagate vines that are patented.) Making your own cuttings is inexpensive, requires no special equipment, and is usually successful. Most grape cultivars root readily from dormant hardwood cuttings.
To assess whether or not you might have vole problems before they do damage, place half an apple under a shingle or a i-foot-square piece of plywood in a grassy area near your trees. Check it the next day. If the apple is completely gone, you've got problems that need treating. If there are only a few nibbles, voles are probably present, so you should keep monitoring and consider control measures.
If you're a dedicated woodworker, blessed with an abundance of power tools and patience, you might prefer to design and construct your own gazebo. To simplify figuring the angles, consider scaling back from eight sides to six. If you'd like your gazebo to have a wood floor, build it like a deck (see pages 172-189) with extra-tall posts and a roof.
Description Skid-resistant polymer or plastic coatings that are applied with a trowel or roller to plywood decking. Also rolls of textured rubber, in various widths, that are glued to plywood with a special adhesive. Appearance Polymer and rubber toppings come in several colors. Neutral-shaded polymer coating can be tinted. Cost 1 to 4 a square foot. Comments Use where slipperiness could be a problem. Because it's self-flashing, polymer coating can make a deck waterproof. Solvent-weld the seams of rubber rolls to turn your raised deck into what amounts to a roof the perfect topper for a patio below. Pitch plywood 1 4 inch per foot for drainage. Use 4-inch exterior- or marine-grade plywood.
Construct your wood frames by nailing four boards together, four feet long at each end and as long at the sides as you want each bed to be. If you don't have lumber that's long enough for the sides (let's say twelve feet long), you can easily splice two pieces together. Butt the ends together and put a piece of plywood on the inside, nail To splice lumber, use a small piece of plywood, nailed on the inside of the bed, and bend over the nail ends. To splice lumber, use a small piece of plywood, nailed on the inside of the bed, and bend over the nail ends.
For the boxes, buy only construction-heart redwood, construction-heart cedar, or ground-contact, pressure-treated common lumber anything else will rot away in just a few years. To retard rust, assemble the boxes with galvanized nails, screws, and corner brackets 2 Cut Winch plywood into panels 3' 2 inches taller than the height your wall will extend above the ground (the earth below provides the form for the footing). Coat plywood with motor oil for easier removal. Nail studs of 2x4 lumber to the plywood, spacing them 24 inches apart. 3 Assemble the form with end pieces of plywood and interior spreaders of 2x4 wood. Set the form in place, make sure it j' level and plumb, then brace it with outriggers and stakes. Push the form into place with one foot while you drive the stakes.
It is easy to construct a simple coldframe for bonsai. Before the ground is frozen, dig a hole at least 1-1 2 feet in the soil. Make the hole as long and as wide as you need for all your plants. Line the sides of this hole with exterior grade plywood, which extends 6 inches above the surface. Put 4 to 6 inches of gravel in the bottom of the hole, set your plant containers on this gravel, and spread straw around and over them. Put a loose-fitting cover on the frame made of polyethylene sheeting or any similar material.
In general, trees have a long breeding cycle and are not suitable for amateur breeders . But selection within existing populations is possible. For example, most of the five-needle pines in North America have been killed by white pine blister rust. Those that survive are likely to be resistant and they merit study. Similarly, selection of the fastest growing gum trees is possible in areas that depend on firewood for cooking. The main species used in plantation forests are divided into softwoods and hardwoods. The principle softwoods are various species of pine, spruce, fir, and larch,. The principle hardwoods are species of gum trees, beech, birch, poplar, and teak.
A species is described as social when the individuals remain together in social groups. The converse is described as a 'solitary' species, in which individuals usually come together only purposes of mating. Social animals are easier to domesticate and dogs, horses, cattle, sheep, and goats are all social species. Social insects include the ants, termites, and bees. It is also possible to speak of 'social' plants that tend to grow in pure stands in the wild. These too are easier to domesticate than solitary species. See also Sociability scale. Softwoods
Good landscape trees in the needled group include pines, spruces, cedar, arborvitae, larch, fir, Douglas fir, dawn redwood, juniper, and yew. (Please note Larch trees and dawn redwoods are unique their needles yellow and drop in the fall, and the trees generate fresh ones every spring.)
In science, reductionism has two quite distinct meanings. The first meaning concerns the search for basic fundamentals, and this is good science. The second means working at the lower systems levels, and this is the opposite of the holistic approach. It is called the merological approach, which can be very dangerous because it leads so easily to suboptimisation. Redwood Redwood trees are evergreens that live for two millennia or more and they are a good example of the durability of horizontal resistance. Having continuous pathosystems, they may be assumed to have no vertical resistances.
Description Naturally rot-resistant lumber that is logged in the Southeast, where cypress is a popular alternative to cedar. As with redwood and cedar, use common-grade above ground and heartwood for elements where rot could set in. Comments Lightweight, soft, and easily worked. As with redwood, consider using cypress for appearance items and pressure-treated wood where strength counts.
All types of lumber come in 8-foot lengths and multiples of 2 feet thereafter. Since most SFGs will be 4X4 feet, ask the lumber company to cut your 8-foot-long wood in half when you buy it. They usually do this for free. Then its easier to take home, quicker to assemble, and eliminates any need for sawing. All types of wood can be used pine, fir, cedar, or even redwood (which is more expensive but longer-lasting), but don't use treated lumber.
The internal structure of the trunk can be understood best by referring to the lower diagram on p. 7, Bark. This develops at an early stage, replacing the epidermis of the young stem. It is a continuous protective layer which is constantly replenished as the stem increases in girth. It can be thin and smooth (Beech), deeply fissured (Oak) or very thick (Redwood). The bark may be conlinually worn away or shed in large flakes (Plane),
Green waste is a fancy term for the plant parts we cut off and send to that magical place called away. Sometimes green waste ends up in landfills, and sometimes it comes back to us as mulch. But the truth is that, in most cases, green waste doesn't need to exist in the first place. It's caused by poor design that puts plants in spaces that are too small for their eventual size, requiring the gardener to trim or prune the plant to fit the size the gardener wants it it be (instead of the size the plant has evolved to be). Plants all have genetic destinies to develop in certain time-honored ways. They grow to fulfill their destinies, often to the detriment of the garden and the gardener. Want proof I once saw a hedge made of young redwood trees (you know, the ones that grow 30-foot trunks ). Fifty-four of these trees were placed a foot apart in a tiny planter space only 8 inches wide. What do you suppose the people who created this landscaping nightmare were thinking
One of the easiest techniques of vegetative propagation is to propagate plants from hardwood cuttings. A hardwood cutting is made during the dormant season from the fully mature stem of a deciduous tree or shrub. Because the cutting has no leaves, the degree of environmental control required for successful propagation is minimal. As with virtually all methods of vegetative propagation, it is the preparation of the parent plant, by pruning rigorously a year before the cutting is to be taken, that is possibly the single most important factor in the ultimate success of rooting a hardwood cutting. Hard, rigorous pruning will encourage stems with a high capability of producing roots. rate slowly declining until autumn, when growth c eases altogether. Even by the end of the growing season, the base of a stem that was produced in spring still has the greatest ability to develop roots, and it should be used for most hardwood cuttings. Hardwood cuttings can be taken any time during the dormant...
Add organic matter to garden soils by working in leguminous green manure crops (such as clover and alfalfa), compost, plant residues, animal manures, peat, sawdust, hardwood shavings, and chopped hay and straw. If you use undecomposed materials such as sawdust, straw, hay, or wood shavings, add nitrogen to hasten decay.
Cut soft wood against a clean pane of glass on the bench in the potting shed. Hard wood should be cut by holding the plant material in the left hand. With the knife blade below the stem and the right thumb above, make a shallow angled slice from beneath, drawing the right forearm backwards and maintaining the gap between the right thumb and the blade. Never attempt to cut by pressing the blade towards the thumb it can have disastrous consequences.
You may be able to find other scrap wood strips around. Carpenters often have strips left over. You just have to keep your eyes open. Quick, Henry, stop the car. I saw something back there. Or, if you have a table saw, its easy enough to cut strips of wood yourself The wood or blind grids can be painted, which kids love to do, creating fancy combinations of colors. For the best visual effect, I think plain white is best. You can also write on them. Everyone loves to sign their name, and sometimes they like to record what they've planted. Its fun to have visitors sign your grid, especially children and grandchildren. Let them pick out which square they like best, and tell them it can be theirs. When they call, you can tell them how their plants are doing. I bet they'll call more often.
As more and more woods were cleared for farming, oak timber increased in value, for it had exceptional utility in country life. The heartwood of English oak has a warm, rich, deep brown colour and is naturally durable there is a paler-coloured band of sap-wood around this, which has little durability, but this is quite thin and could easily be allowed for when the timber was worked up. Oak is strong and so hard that it presents problems in shaping and nailing - ordinary wire nails, for example, cannot be driven into it, but it can readily be secured with screws or pegs. The wide, easily-seen rays that run from the centre of the log to its circumference give it an attractive figure, which may be revealed by skilful cleaving or sawing as 'silver grain.' These rays also make it easy for a craftsman to cleave logs into segments with axe or wedge, and oak can be readily hewn with an adze to squared outlines. Before power saws and sawmills were developed, country carpenters shaped building...
The timbers of both the birches are much alike, but neither is of mudi commercial value in Britain. In Scandinavia where trees of better form and larger si2e are common, the wood is widely used for furniture and for peeling the veneers that are used in birch-surfaced plywood. Our smaller trees yield a good deal of turnery wood, which is made into broom heads, tool handles, and small wooden objects of many kinds. Birch wood is pale brown in colour, with a dull surface, and is both hard and strong it is not durable out of doors, but lasts well if kept dry. It is a first-rate firewood, and still provides most of the winter fuel for farms in Scandinavia and amid the Alps.
The central region of xylem sometimes becomes darkly stained with gums and resins (heartwood) and performs the long-term function of support for a heavy trunk or branch. The outer xylem, the sapwood, is still functional in transporting water and nutrients, and is often lighter in colour. The xylem tissue produced in the spring has larger diameter vessels than autumn-produced xylem, due to the greater volume of water that must be transported a distinct ring is therefore produced where the two types of tissue meet. As these rings will be formed each season, their number can indicate the age of the branch or trunk they are called annual rings. The phloem tissue is pushed against the cork layers by the increasing volume of xylem so that a woody stem appears to have two distinct layers, the wood in the centre and the bark on the outside.
In all the methods described, cell division (see mitosis) must be stimulated in order to produce the new tissues and organs. The correct balance of hormones produced by the cells triggers this initiation. Auxins are found to stimulate the initiation of adventitious roots of cuttings. In the propagation of cuttings, the bases may be dipped in powder or liquid formulations of auxin-like chemicals such as naphthalene acetic acid to achieve this result. The number of roots is increased and production time reduced. The precise concentration of chemical in the cells is critical in producing the desired growth response. A large amount of hormone can bring about an inhibition of growth rather than promotion. For this reason, manufacturers of hormone powders and dips produce several distinct formulations with differing hormone concentrations, relevant to the hardwood, the semi-ripe, and the softwood cutting situations. Also different organs respond to different concentration ranges e.g. the...
Stem cuttings can be taken from stems that have attained different stages of maturity. Hardwood cuttings are from pieces of dormant woody stem containing a number of buds, which grow out into shoots when dormancy is broken in spring. The base of the cutting is cut cleanly to expose the cambium tissue from which the adventitious roots will grow (e.g. in rose rootstocks, Forsythia, and many deciduous ornamental shrubs). In Hydrangea and currant the stems show evidence of pre-formed adventitious roots (root-initials), which aid the process of root establishment. Hardwood cuttings are normally taken in late autumn (they are 15-25 cm in length), and are often placed with half their length immersed in a growing medium containing half compost and half sand. A 12-month period is often necessary before the cuttings can be lifted.
Rowan logs have a dark purplish-brown heartwood with a pale yellowish-brawn sapwood layer around it The wood is strong, hard, tough, and easily worked, but the tree is too small to yield supplies acceptable to industry. It was formerly used in country crafts for furniture, tool handles, mallet heads, cart shafts, bowls and platters, and household utensils such as spinning wheels.
Lengths of' glass fibre, the kind used by builders For insulation, may be placed against the wood on the inside of the house. They can then be held in place with pieces of asbestos-cement sheet cut to fit. These add further to the insulation and also protect the woodwork from water.
The standard model fiberglass greenhouse has four sets of vents and a pre-assembled Dutch door frame. The frame is top-quality California redwood. Individual parts are pre-assembled at the factory. The standard model fiberglass greenhouse has four sets of vents and a pre-assembled Dutch door frame. The frame is top-quality California redwood. Individual parts are pre-assembled at the factory. From an aesthetic standpoint redwood is probably the best material for a home greenhouse. It blends well with residential architecture and landscaping, whereas metal frames generally distract from the appearance of a home. There are many advantages to redwood. It is easy to insulate for winter use and transmits heat less readily than aluminum. Expansion and contraction are significant with redwood. It is extremely easy to work. Minor modifications and additions for shelves, hanging basket brackets and special vents are easy to make. Redwood does not have to be painted.
The wood of robinia is golden yellow in colour, with a paler sapwood fringe. It is hard, strong and naturally durable, and the American settlers made great use of it for fencing, tool handles, cart shafts and other exacting purposes. Unfortunately the trunk is nearly always twisted and fluted, and now that sawmills have succeeded hand tools for working up timber, it is scarcely ever used. Robinia is grown simply as an ornamental tree in cities, parks and large gardens. It is unsuitable for smaller ones since it drops a varied titter of spent blossom, faded leaves and seed pods, and is apt to send up strong sucker shoots from its roots. These roots carry the nodules, typical for the Sweet pea family, which hold bacteria that enable the plant to 'fix' the nitrogen of the air this enables robinia to thrive on poor soils, so it is sometimes used to cover slag heaps.
Double-digging is the term used for the process of preparing your soil 2 spades deep (about 24 inches). To begin, mark out a bed 3 to 5 feet wide and at least 3 feet long. Most people prefer a bed 5, 10, or 20 feet long, but the maximum is up to you. To double-dig, remove the soil from a trench 1 foot deep and 1 foot wide across the width of one end of the bed. Use a 5 8-inch-thick plywood board, 2 to 3 feet long by 3 to 5 feet wide, to stand on. Place it on top of the 1-inch compost layer you spread over your bed, and advance it along the bed 1 foot at a time as you prepare to dig each new trench. Move 7 5-gallon buckets of soil from the beginning of the bed to a soil storage area for use in making compost and flat soil.
If you want to edge your patio with wood, construct permanent forms with redwood, cedar, or pressure-treated lumber. Apply a coat of sealer to further enhance the wood's natural rot resistance, then put masking or duct tape on the top edges to keep cement from staining or scratching the wood. (See pages 122-123.)
The pine trees, which are members of the family Pinaceae, in the order Coniferae, which is one of the five orders of the Gymnosperms. These are particularly important timber trees that provide much of the world's soft wood. Selection within existing populations, particularly in North America, looking for horizontal resistance to white pine blister rust (Cronartium ribicola) would be an appropriate activity for a university breeding club made up of forestry students.
On the other hand, greenhouses made of softwood will need painting every other year if decay and general deterioration is to be avoided and they are without question more difficult and costly to maintain. The warmth and moist atmospheric conditions inseparable from the good growing conditions demanded b so many plants has a detrimental effect on unprotected wood. Greenhouses of cedar wood construction need brushing down occasionally with a teak oil or an oil sold specially for this purpose, but they do not need painting. However, their higher price must not he forgotten. My second greenhouse is of cedar wood construction, measures 13 ft. by 8 ft. and is double glared. This double glazing reduces the cost of heating to lesi than 50 per cent, of that expended on the metal greenhouse. Because of the high cost of manufacturing these double-glazed greenhouses they are not. unfortunately, on sale any longer but the same effect can be achieved hv lining an ordinary greenhouse with thin...
When you order lumber, specify construction-heart redwood or cedar or ground-contact, pressure-treated wood for all posts and bottom rails upper rails and fencing can be less expensive grades of rot-resistant lumber. To minimize rust, buy hot-dip galvanized nails and fittings.
The law that states that gene frequencies will remain constant from generation to generation, provided that no other factors, such as selection or mutation, are operating. Hardwoods Timber trees that are Dicotyledons . The timber of these trees is suitable for fine furniture and cabinet making. See also Softwoods. Haricot bean
The main alternatives for greenhouse farming are galvanized steel, aluminum and wood. Aluminum is most commonly used because it is light and strong, and doesn't warp. It transmits and thus loses heat, but only to a minor degree. Galvanized steel is very strong, but it sometimes flakes and rusts. Wood has been used for many years. Redwood and cypress are quite good, but construction-grade pine and fr should be checked carefully. Wood is strong, durable and good-looking, but it is bulky and prone to crack.
Traditionally a seed tray is madeof soft wood and its dimensions are 14 in by in and, according to its required usage, either 2 in or 2 in deep. These trays are now relatively expensive to purchase and their expected life is fairly short as they rot easily. However, they have the distinct advantage of being firm and rigid.
In general terms it is the vigorous young shoot, which has not yet reached the point of flowering or ripened its wood, that roots most readily. There are green tip cuttings, semi-ripe cuttings and hardwood cuttings, as well as leaf and root cuttings, but the favourite greenhouse plants in this chapter are increased by young shoots. These need to be neatly severed, with a sharp knife or razor blade, just beneath the node or joint and put into their rooting medium while still crisp and fresh.
Softwood, mainly pme, is the favourite wood for glazing bars, while hardwoods are normally used lor the sills. Modern techniques of preserving wood arc now widely employed, but prospective purchasers should ensure that such treatments have been properly carried out, ideally under pressure, to force the preservative into all the timber. Simply brushing on such preservative is virtually useless. Some manufacturers use a hardwood such as oak throughout, and greenhouses of this type have a long, relatively maintenance-free life. Western red cedar is an attractive looking wood and has been used in the more expensive greenhouse ranges for many years. It is not ,ts strong as some other woods, so the timber sections need to be somewhat thicker, but its attractions are the colour, which looks well in almost every garden setting, and freedom tram the need tor painting, hi fact, no paint applied at ail. just a suitable .preserving oil which needs to be brushed on every two or three years. Many...
Sweet chestnut is easily raised from seed, provided the nuts are carefully stored and not allowed to get too dry or become mouldy moist sand is a good storage medium. Chestnut timber is very strong and Its heartwood is naturally durable it resembles oak but lacks that tree's decorative 'silver grain.' Trees may reach 35m tall, and 10m round. But chestnut is rarely planted to yield timber because some - though by no means all - of its trunks develop serious cracks called 'shakes.' which makes it hard to cut large planks from them. In south-east England much chestnut is grown on the coppice system, to provide small poles. The woods are cut over every 12 years or so, and a fresh cluster of poles then springs out from the stump without further care or replanting. Most of the poles are cleft always by hand - into smaller pales which are bound with wire to make chestnut pale fencing. Each pale contains - for its thin cross-section, a great deal of heartwood, and it is therefore both very...
Pages 184-185 present your materials options. No law says you must use the same grade or species of wood throughout a project. For economy, we used pressure-treated lumber for all the structural members of our raised deck. For appearance' sake, we used redwood for the decking, skirting, railings, and stairs.
Figure 2 is probably the simplest hydroponic system you can make. Using 3 4 inch plywood, make a box 7 inches deep, 16 inches wide and 24 inches long (all outside dimensions). Fasten the box with wood screws, allowing for the fact that the contents will be heavy. Drill two 1 2 inch holes on one end wall 1 2 inch from the inside bottom. Line the inside of the box with polyethelene or fibreglass and fit two removable plugs. On the opposite end from the drainage plugs, a 1 inch strip of plywood can be nailed to the bottom. This will sit the tank on an angle and ensure adequate drainage. 1 sheet 3 4 inch plywood 6 feet of 1 2 inch plastic tubing (siphon hose for system flushing) 1 box of 2 inch wood screws 1. It is easier to use 1 by 3 for the crosspieces than plywood. Simply rip a piece of 1 by 3 for the 1 2 inch strip as well as the retention strips. Instead of a 3 inch deep growing tray, you could follow a similar method as the large system in Figure 5. That is, a 1 2 inch plywood...
1 For a preview of how your deck will look. JL test-assemble a section on a patio, drive, or other open space. This also gives you a chance to identify your straightest lumber. Cut scraps of ' - or -Winch plywood to serve as spacers between boards. Also nail decking boards to the joists crown side up. Drive at least two nails into each joist, maintaining uniform gaps between boards with plywood spacers. For strength, stagger end-to-end joints. Also nail decking boards to the joists crown side up. Drive at least two nails into each joist, maintaining uniform gaps between boards with plywood spacers. For strength, stagger end-to-end joints.
You can take advantage of insects' color preferences in making traps. If you have some scrap wood, paint it yellow, cover it with a sticky coating, and fojl place it in the garden to lure aphids, imported cabbageworms, fungus gnats, and several types of flies (including whiteflies). Codling moths prefer white traps. Trap thrips with sticky blue cards. To make cleanup easier, cover the trap with plastic wrap before applying the sticky coating.
When it's time to upgrade or replace your garden toois, consider earth-friendly versions that don't rely on new-wood products or costly prime metals. These tools have sturdy bamboo handles, blades made from recycled steel and grips made of reclaimed plastics. The line includes a bow rake, hoe, cultivator and several long- and short-handled shovels. From 15. 800-393-1846 ames.com.
A Newbies Guide To Wood Working
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