蛙鸣声
发表于 2025-3-25 05:58:13
Other macroelements,n as .- or . elements, and those required only in relatively small amounts are known as .- or . elements. Irrespective of the actual quantities required by the plants, however, both groups are equally .; only a few elements such as barium, fluorine, iodine, and strontium do not appear to be essentia
听写
发表于 2025-3-25 09:30:34
Microelements,0.–10. times the amount of such macroelements as nitrogen and potassium, they are nevertheless equally essential for normal plant growth. Deficiency of a microelement such as molybdenum can be just as important as macroelement deficiency. The elements which are generally regarded as being essential
Rinne-Test
发表于 2025-3-25 12:30:31
Mix formulation and preparation,general acceptance into horticulture. As with many horticultural practices, evolution has occurred over a long period. Peat, leafmould and pine needles have been used for growing azaleas by many generations of gardeners, and experiments made at Versailles in 1892 on the nutrition of azaleas in these
去世
发表于 2025-3-25 16:57:34
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指数
发表于 2025-3-25 22:38:08
Irrigation systems,unless replenished by frequent irrigations. Some plants may require as many as three irrigations per day in mid-summer to prevent wilting. The high cost of labour has encouraged the use of various automatic or semi-automatic systems of irrigation and the majority of commercially grown pot plants are
情爱
发表于 2025-3-26 03:12:48
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摘要
发表于 2025-3-26 06:31:37
Heat pasteurization,before they are used for making potting media. This method of controlling soil pathogens was first used by glasshouse growers at the end of the nineteenth century and rapidly increased in importance until the 1950s, when virtually all the mineral soil used in potting media was heat treated. Since th
abracadabra
发表于 2025-3-26 11:47:18
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媒介
发表于 2025-3-26 13:07:23
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Metamorphosis
发表于 2025-3-26 20:00:43
A. C. Buntitet. Ihre besondere Bedeutung erfährt die originäre Selbstorganisation — wie im gerade abgeschlossenen vierten Kapitel gezeigt — in Anbetracht der auf der Basis des ’Social Constructionist’-Paradigmas begründeten organisatorischen Gestaltungsspielräume. Indem sie nämlich ein gleichberechtigtes Nebe