The Theory of Horticulture: Or, An Attempt to Explain the Principal Operations of Gardening Upon Physiological PrinciplesLongman, Orme, Brown, Green, and Longmans, 1840 - 387 من الصفحات |
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عبارات ومصطلحات مألوفة
absorbing abundance action alburnum amount appears Apple aqueous artificial atmosphere bark become blossoms bottom heat branches buds calyx carbonic acid cause cellular circumstances cold colour consequence crop cultivated damp decompose diminished ditto double flowers dryness earth effect employed epidermis excessive exposed favourable flowers fluid formed gardener germination grafting grow growth healthy Hort Horticultural Horticultural Society inches injury kind Knight leaf leaf-buds leaves Malaxis paludosa manure Mean Degree medullary rays moisture nature necessary observed obtained operation organisable matter oxalic acid oxygen Peach Pear perature period perish perspiration Pine-apple pistil plants Plum pollen pots practice produce propagation proportion pruning quantity ripening roots scion season seed seedling shoots soil species spring stamens stem stomates succulent sufficient summer supply surface take place temperature thermometer tion tissue Trans transplanting vapour varieties vegetable vigour Vine vital winter wood woody wound young
مقاطع مشهورة
الصفحة 225 - As soon as the buds had attached themselves, the lower ligature was taken off, but the others were suffered to remain. ' The passage of the sap upwards was, in consequence, much obstructed, and the inserted buds began...
الصفحة 238 - When great difficulty is found in making a tree, whether fructiferous, or ornamental, of any species, or variety, produce blossoms, or in making its blossoms set when produced, success will probably be obtained in almost all cases, by budding or grafting upon a stock which is nearly enough allied to the graft to preserve it alive for a few years, but not permanently. The...
الصفحة 74 - I was led to suspect, that the disease originated in the preternaturally inspissated state of the sap in the dry and farinaceous varieties. I conceived that the sap, if not sufficiently fluid, might stagnate in, and close, the fine vessels of the leaf during its growth and extension, and thus occasion the irregular contractions which constitute this disease ; and this conclusion, which I drew many years ago, is perfectly consistent with the opinions I have subsequently entertained, respecting the...
الصفحة 153 - The quantity of atmospheric moisture required by plants is, ceeteris paribus, in inverse proportion to the distance from the equator of the countries which they naturally inhabit. 3. Plants with annual stems require more than those with ligneous stems. 4. The amount of moisture in the air most...
الصفحة 315 - ... his crops of the same kind do, when he uses the seeds of plants, which have passed through several successive generations in his colder climate; and in my own experience, I have found that the crops of wheat on some very high and cold ground, which I cultivate, ripen much earlier when I obtain my seed-corn from a very warm district and gravelly soil, which lies a few miles distant, than when I employ the seeds of the vicinity.
الصفحة 90 - The power of plants to resist extremes of temperature is directly in proportion to the viscidity of their fluids. 3. The power of plants to resist cold is in the inverse ratio of the rapidity with which their fluids circulate. 4r. The liability to freeze, of the fluids contained in plants, is greater in proportion to the size of the cells.
الصفحة i - Theory and Practice of Horticulture ; or, an Attempt to explain the principal Operations of Gardening upon Physiological Grounds: Being the Second Edition of the Theory of Horticulture, much enlarged ; with 98 Woodcuts.
الصفحة 110 - ... tree, nor its foliage, nor its blossoms, appear to sustain any material injury by this sudden suspension of its functions ; but the crop of acorns invariably fails. The apple and pear tree appear to be affected to the same extent by similar degrees of cold. Their blossoms, like those of the oak, often unfold perfectly well, and present the most healthy and vigorous character ; and their pollen sheds freely. Their fruit also appears to set well ; but the whole, or nearly the whole, falls off just...
الصفحة 126 - ... the ground, and rendering it impervious, so that the descent of water to the roots is impeded, whether it is communicated artificially, or by the fall of rain. It is, therefore, doubtful whether artificial watering of plants in the open air is advantageous, unless in particular cases ; and most assuredly, if it is done at all, it ought to be much more copious than is usual.
الصفحة 155 - I employ very little fire-heat, and never give air, till my Grapes are nearly ripe, in the hottest and brightest weather, further than is just necessary to prevent the leaves being destroyed by excess of heat. Yet this mode of treatment does not at all lessen the flavour of the fruit, nor render the skins of the Grapes thick ; on the contrary, their skins are always most remarkably thin, and very similar to those of Grapes which have ripened in the open air.