Basic Gardening Illustrated pdf epub mobi txt 電子書 下載 2024


Basic Gardening Illustrated

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Sunset Pub Co
1985-12
160
USD 13.99
Paperback
9780376030757

圖書標籤: 園藝  黑白  英文  圖解   


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发表于2024-11-22

Basic Gardening Illustrated epub 下載 mobi 下載 pdf 下載 txt 電子書 下載 2024

Basic Gardening Illustrated epub 下載 mobi 下載 pdf 下載 txt 電子書 下載 2024

Basic Gardening Illustrated pdf epub mobi txt 電子書 下載 2024



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If you find that certain plants do<br >poorly regardless of care, or the<br >whole garden grows too slowly,<br >looks stunted, and has a high mor-<br >Acidity<br >Acid soil is at the other end of the scale<br >from alkaline soil. It is most common<br >in areas of heavy rainfall and is often<br >associated with sandy soil (but ocean<br >beaches are rarely or never acid). Soils<br >high in organic matter tend to be acid<br >rather than alkaline.<br > Mildly acid soils cause little trouble,<br >and some plants--azaleas, rhododen-<br >drons, and camellias, to name a few--<br >prefer soil that is moderately acid. But<br >for most plants an intense acid condi-<br >tion is highly undesirable.<br > When a test indicates that soil is<br >acid, adding liming materials will help<br >to neutralize it, since all acid soils are<br >low in calcium (lime). Fertilizers can be<br >another very important factor in con-<br >trolling acidity: some fertilizers can ac-<br >tually increase soil acidity.<br >means the only ailments to occur,<br >but they are common ones that<br >home gardeners should be aware<br >of.<br > Nursery personnel, experi-<br >I~.i~ ~ enced local gardeners, and agricul-<br > tural extension agents can be help-<br > ful in testing or evaluating your soil.<br > You could also get a detailed anal-<br > ysis from a commercial laboratory<br >tality rate, examine the six soil or use a do-it-yourself soil testing<br >problems and solutions discussed kit. The kits are widely available and<br >below, will give you a good idea of the<br > These soil problems are by no status of your soil.<br >Alkalinity<br >Alkaline soil, common in light-rainfall<br >areas, is soil that is high in calcium<br >carbonate (lime) and certain other min-<br >erals. Many plants will grow well in a<br >moderately alkaline soil, though camel-<br >lias and other acid-loving plants will not<br > Gardens in which softened water is<br >used are quite likely to have alkaline<br >soil.<br > Gypsum may be useful in some<br >alkaline soils; iron and sulfur benefit<br >moderately alkaline soils. Since large-<br >scale chemical treatment of extremely<br >alkaline soils is expensive and complex,<br >it might be easier to plant in improved<br >soil in raised beds and containers.<br >Nutrient deficiency Salinity<br >Most soils, left alone, yield the three<br >major plant nutrients--nitrogen,<br >phosphorus, and potassium--very<br >slowlv.<br > Fertilizers, either chemical or or-<br >ganic, are the quickest and easiest an-<br >swer to a nutrient deficiency. Many<br >complete fertilizers, containing all<br >three major elements, are available (see<br >the chapter on fertilizing techniques<br >beginning on page 29). There are also<br >formulations of nitrogen, phosphorus,<br >or potassium compounds that provide<br >these nutrients separately. Organic<br >amendments and soil conditioners are<br >also beneficial in varying degrees<br >An excess of salts in the soil is a wide-<br >spread problem in arid and semiarid<br >regions. It can prevent germination; or<br >if plants are already growing, it stunts<br >them and in advanced cases burns their<br >foliage and finally kills them. Its pres-<br >ence can usually be detected by white<br >deposits of salt on the surface of the<br >soil. Frequent and shallow watering<br >(especially with softened water), as well<br >as use of certain fertilizers, can cause<br >salts to build up. Periodic slow, deep<br >watering will help wash the salts beyond<br >roots (if there s no compacted soil).<br >Chlorosis<br >Chlorosis is a plant condition fre-<br >quently caused by the inability of plants<br >to take in iron from the soil through<br >their root systems. If the deficiency is<br >mild, areas of yellow show up between<br >the veins of the leaf; if the deficiency is<br >severe, the entire leaf turns yellow.<br > Iron deficiency in the plant is only<br >occasionally the result of deficient<br >amounts of iron in the soil; more fre-<br >quently it is the result of some other<br >substance (principally lime) that ren-<br >ders the iron unavailable. Sometimes<br >chlorosis results from magnesium de-<br >ficiency, even when iron is present.<br > Chemical treatment of the soil with<br >chelated iron or iron sulfate can cor-<br >rect chlorosis. You can treat plants with<br >serious iron shortages by spraying foli-<br >age with a special iron solution.<br >Shallow compacted soil<br >A tight, impervious layer of soil can give<br >trouble if it lies at or near the surface.<br >Such a layer--known as hardpan--<br >can be a natural formation or it can be<br >manmade. Roots cannot penetrate the<br >hard layer, and water cannot drain<br >through it.<br > If the hardpan layer is thin and if<br >your garden plot is accessible to heavy<br >equipment, you may be able to lessen<br >or eliminate the problem by having the<br >soil plowed to a depth of 12 inches or<br >more. If this is impractical, you can<br >drill through it with a soil auger when<br >planting. If the layer is too thick, you<br >may want to have a landscape architect<br >help ~ou with a drainage system, which<br >mighl~volve sumps (side or bottom)<br >or d~h tiles. Or you can switch to<br >raise[t beds and container gardening.<br >Understanding Your Soil 5<br ><br >

Basic Gardening Illustrated 下載 mobi epub pdf txt 電子書

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Basic Gardening Illustrated pdf epub mobi txt 電子書 下載
想要找書就要到 小哈圖書下載中心
立刻按 ctrl+D收藏本頁
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用戶評價

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Sunset齣版社園藝係列中的一本,很全麵的基本知識介紹。

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Sunset齣版社園藝係列中的一本,很全麵的基本知識介紹。

評分

Sunset齣版社園藝係列中的一本,很全麵的基本知識介紹。

評分

這本書寫的好全好全,圖解也很容易看懂。不知道這麼好的書有沒有再版 > <

評分

這本書寫的好全好全,圖解也很容易看懂。不知道這麼好的書有沒有再版 > <

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