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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الصفحة xiii
... Light . Humidity . - Chemical Changes - CHAP . II . - GROWTH BY THE ROOT . - - - Roots lengthen at their Points only . - Absorb at that Part chiefly . Increase in Diameter like Stems . Their Origin . Are feeding Organs . Without much ...
... Light . Humidity . - Chemical Changes - CHAP . II . - GROWTH BY THE ROOT . - - - Roots lengthen at their Points only . - Absorb at that Part chiefly . Increase in Diameter like Stems . Their Origin . Are feeding Organs . Without much ...
الصفحة xiv
... Light . - Digestion or Decomposition of Car- bonic Acid . Insensible Perspiration . - Formation of Secretions . - Fall of the Leaf . Formation of Buds by Leaves - - CHAP . V. ACTION OF FLOWERS . Structure of Flowers . Names of their ...
... Light . - Digestion or Decomposition of Car- bonic Acid . Insensible Perspiration . - Formation of Secretions . - Fall of the Leaf . Formation of Buds by Leaves - - CHAP . V. ACTION OF FLOWERS . Structure of Flowers . Names of their ...
الصفحة 7
... Light.- Humidity . -Chemical Changes . 11. A SEED is a living body , separating from its parent , and capable of growing into a new indi- vidual of the same species . It is a reproductive fragment , or vital point , containing within ...
... Light.- Humidity . -Chemical Changes . 11. A SEED is a living body , separating from its parent , and capable of growing into a new indi- vidual of the same species . It is a reproductive fragment , or vital point , containing within ...
الصفحة 9
... light , the seed again parts with some of its oxygen , and again fixes its carbon by the decomposition of its car- bonic acid . 16. In addition to this , the absorption of water causes all the parts to soften and expand ; many of the ...
... light , the seed again parts with some of its oxygen , and again fixes its carbon by the decomposition of its car- bonic acid . 16. In addition to this , the absorption of water causes all the parts to soften and expand ; many of the ...
الصفحة 10
... light , decompose carbonic acid , fix the carbon , become green , and , by processes hereafter to be explained , when speaking of leaves , form the matter by which all the pre - existing parts are solidified . And thus a plant is born ...
... light , decompose carbonic acid , fix the carbon , become green , and , by processes hereafter to be explained , when speaking of leaves , form the matter by which all the pre - existing parts are solidified . And thus a plant is born ...
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عبارات ومصطلحات مألوفة
absorbing abundance action alburnum amount appears Apple artificial atmosphere bark become blossoms BOTANY bottom heat branches buds calyx carbonic acid cause cellular circumstances cloth lettered cold colour consequence crop cultivated damp decompose diminished ditto double flowers dryness earth Edition effect employed epidermis exposed favourable flowers fluid formed fruit gardener germination grafting grow growth healthy Hort Horticultural Horticultural Society inches injury J. C. LOUDON kind Knight leaf leaf-buds leaves manure medullary rays moisture nature necessary obtained operation organisable matter oxalic acid oxygen Peach Pear perature period perish perspiration Pine-apple pistil plants Plum pollen pots practice present produce propagation proportion quantity ripening roots scion season seed seedling shoots soil species spring stamens stem succulent sufficient summer supply surface take place temperature thermometer tion tissue Trans transplanting trees vapour varieties vegetable Vine vital winter wood woody wound young
مقاطع مشهورة
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 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 162 - I attached the tree to the stake, at the height of six feet, by means of a slender pole about twelve feet long; thus leaving the tree at liberty to move towards the north and south, or, more properly, in the segment of a circle, of which the pole formed a radius; but in no other direction. Thus circumstanced, the diameter of the tree from north to south, in that part of its stem which was most exercised by the wind, exceeded that in the opposite direction, in the following autumn, in the proportion...
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 75 - I drew many years ago, is perfectly consistent with the opinions I have subsequently entertained* respecting the formation of leaves. I therefore suffered a quantity of Potatoes, the produce almost wholly of diseased plants, to remain in the heap, where they had been preserved during winter, till each tuber had emitted shoots of three or four inches long.
الصفحة 69 - If the pistil of one species be fertilised by the pollen of another species, which may take place in the same genus, or if two distinct varieties of the same species be in like manner intermixed, the seed which results from the operation will be intermediate between its parents, partaking of the qualities of both father and mother. In the first case the progeny is hybrid, or mule ; in the second it is simply erossbred.
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.
الصفحة 237 - ... of the tree, and its power to nourish a succession of heavy crops, are diminished, apparently, by the stagnation, in the branches and stock, of a portion of...
الصفحة 342 - Fahrenheit. After these showers have continued for a short period, the tropical summer appears in all its splendour. Clouds are seldom seen in the sky; the heat of the sun is only rendered supportable by the sea breeze, which blows regularly from the south-east during the greater part of the day. The nights are calm and serene, the moon shines more brightly than in Europe, and emits a light that enables man to read the...